Generating contextual tags for digital content

ABSTRACT

Systems, methods, and non-transitory computer-readable media are disclosed for determining multi-term contextual tags for digital content and propagating the multi-term contextual tags to additional digital content. For instance, the disclosed systems can utilize search query supervision to determine and associate multi-term contextual tags (e.g., tags that represent a specific concept based on the order of the terms in the tag) with digital content. Furthermore, the disclosed systems can propagate the multi-term contextual tags determined for the digital content to additional digital content based on similarities between the digital content and additional digital content (e.g., utilizing clustering techniques). Additionally, the disclosed systems can provide digital content as search results based on the associated multi-term contextual tags.

BACKGROUND

Recent years have seen a significant increase in digital content (e.g.,digital images and digital videos) available on electronic devices andthe Internet. In particular, an increasing number of digital content ismade available to individuals and businesses. For example, the ease ofcreating digital content on electronic devices, such as smart phones,has led to the creation and storage of large quantities of digitalcontent. Furthermore, users may desire to find particular content. Forinstance, a user may desire to find digital content relating to aparticular context. Although conventional digital visual systems enableusers to create, view, modify, describe, upload, and search for digitalcontent, they also have a number of significant shortcomings,particularly in regard to searching for or otherwise retrieving digitalcontent.

For example, conventional digital visual systems oftentimes cannoteasily, accurately, and/or efficiently utilize tags to search for and/orretrieve contextually relevant content in large collections in responseto context provided in a search query (e.g., they are often unable toexploit the correlations among tags to improve relevance in retrieval ofimages). For instance, conventional digital visual systems often involvesearching based on an inverted index of tag-to-image mappings. Manyconventional digital visual systems utilize tags that fail to captureall of the concepts present in an image (e.g., the tags lack semanticcompleteness and/or fail to capture all levels of semantic granularity).Moreover, some conventional systems may pollute (i.e., spam) an imagewith excessive tags in an attempt to surface the image in as manyqueries as possible. However, such approaches often result in theconventional systems surfacing irrelevant images for search queriesbecause of the excessive tags. Additionally, conventional digital visualsystems often utilize bag-of-words models to associate tags with digitalcontent, however such tags often lose context (or relationships betweenthe tags).

As an example, some conventional digital visual systems can associatetags such as “boy,” “red,” “hat,” “yellow,” and “shirt” to an imageportraying a boy with a red hat and yellow shirt. However, theseconventional digital visual systems often provide such an image inresponse to a search query (e.g., a tag based search) that states “a boywith a yellow hat and red shirt” because the search query includes termsassociated with the tags of the image. Indeed, many conventional systemsdetermine and associate independent tags to images without preservingcontext and, as demonstrated above, affect the quality of searchresults. As a result, conventional digital visual systems often fail toeasily, accurately, and/or efficiently utilize those tags to search forand/or retrieve contextually relevant content in response to contextprovided in a search query. For instance, conventional digital visualsystems often inefficiently utilize computing resources by conductingadditional search queries, responding to additional queries, andtransmitting additional digital content due to the contextualinaccuracies in search results.

In addition, conventional digital visual media systems often fail toeasily, accurately, and/or efficiently determine tags that arecontextually relevant to the digital content in large collections ofdigital content (e.g., thousands or millions of images). In particular,many conventional digital visual systems identify objects portrayed indigital content to tag the digital content based on the identifiedobjects. However, conventional digital visual systems often cannoteasily, accurately, and/or efficiently determine context between theidentified objects and determine tags that maintain such context fordigital content in large collections. Indeed, oftentimes, conventionaldigital visual systems spend a lot of resources (e.g., money) to taglarge collections of digital content accurately (e.g., with the contextof the digital content intact) by using human annotators. Furthermore,sometimes, a large portion of digital content in many conventionaldigital visual systems does not get surfaced during search queriesand/or does not receive user attention. As a result, in manyconventional digital visual systems, contextually relevant tags are notgenerated for a majority of digital content items that do not havesupervised labels.

SUMMARY

This disclosure describes one or more embodiments that provide benefitswith systems, computer-readable media, and methods that accuratelygenerate multi-term contextual tags for digital content (e.g., tags thatrepresent a specific concept based on the order of the terms in thetag). In particular, the disclosed systems utilize a multi-modallearning framework to mine relevant tag combinations from search engineuser behavior data and to propagate these across the image database(e.g., to other similar images). To illustrate, the disclosed systemscan utilize search query supervision to determine and associatemulti-term contextual tags and tag scores with images based on userselections to search queries including multi-term contextual tags.Furthermore, the disclosed systems can automatically propagatemulti-term contextual tags to other images (e.g., images thatinfrequently receive user attention). For instance, the disclosedsystems can identify visually similar neighbor images and associatemulti-term contextual tags, that belong to one or more of the neighborimages, with each of the neighboring images by weighting and ranking themulti-term contextual tags. In this manner, the disclosed systems canallow efficient and accurate searching and retrieval of desired imagesthat accurately portray the search query context.

For example, in order to generate multi-term contextual tags for digitalcontent, in one or more embodiments, the disclosed systems can determineand associate one or more multi-term contextual tags with one or moredigital content items based on a correspondence between user searchqueries, tags of the one or more digital content items, and userselections of the one or more digital content items in response to theuser search queries. Furthermore, the disclosed systems can propagatethe one or more multi-term contextual tags to one or more additionaldigital content items based on a similarity between the one or moreadditional digital content items and the one or more digital contentitems associated with the one or more multi-term contextual tags (e.g.,using k-nearest neighbor techniques and based on a combination of tagscores and digital content item similarity scores). Additionally, thedisclosed systems can receive an additional search query including amulti-term contextual tag and return a digital content item associatedwith the multi-term contextual tag.

Additional features and advantages of one or more embodiments of thepresent disclosure will be set forth in the description which follows,and in part will be obvious from the description, or may be learned bythe practice of such example embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description is described with reference to the accompanyingdrawings in which:

FIG. 1 illustrates a schematic diagram of an example environment inwhich a digital content contextual tagging system can operate inaccordance with one or more embodiments.

FIG. 2 illustrates a flowchart of a digital content contextual taggingsystem determining and associating multi-term contextual tags usingsearch query supervision in accordance with one or more embodiments.

FIG. 3 illustrates a flowchart of a digital content contextual taggingsystem propagating multi-term contextual tag to additional digitalcontent in accordance with one or more embodiments.

FIG. 4 illustrates a digital content contextual tagging systemdetermining and associating multi-term contextual tags using searchquery supervision in accordance with one or more embodiments.

FIG. 5A illustrates a digital content contextual tagging systemgenerating a cluster of images for propagation of multi-term contextualtags in accordance with one or more embodiments.

FIG. 5B illustrates a digital content contextual tagging systempropagating multi-term contextual tag to additional digital content inaccordance with one or more embodiments.

FIG. 6 illustrates a digital content contextual tagging systemretrieving digital content based on multi-term contextual tags inresponse to a search query in accordance with one or more embodiments.

FIG. 7 illustrates a schematic diagram of a digital content contextualtagging system in accordance with one or more embodiments.

FIG. 8 illustrates a flowchart of a series of acts for determiningmulti-term contextual tags for digital content and propagating themulti-term contextual tags to additional digital content in accordancewith one or more embodiments.

FIG. 9 illustrates a block diagram of an example computing device inaccordance with one or more embodiments.

DETAILED DESCRIPTION

One or more embodiments of the present disclosure include a digitalcontent contextual tagging system that can determine multi-termcontextual tags for digital content and propagate the multi-termcontextual tags to additional digital content. In particular, thedigital content contextual tagging system can utilize a multi-modallearning framework to mine relevant tag combinations from search engineuser behavior data and propagate these across an image database (e.g.,to other similar images). More specifically, based on the assumptionthat user behavior is a form of weak labeling, the digital contentcontextual tagging system utilizes user queries and their image clicksignal as one modality of signal and a deep neural network for imageunderstanding as the other modality to perform visual grounding of tagcorrelations.

In the first stage, the digital content contextual tagging system minestag-combinations from query-image clicks, which form the ground truthfor associating tag-combinations with the clicked images. There is alarge torso and tail of images which receive few or no clicks. In viewof this, the digital content contextual tagging system utilizes visualsimilarity to propagate tag-combinations onto these images from theimages which have high click-through. The digital content contextualtagging system also performs this process on images with existingclick-through in order to reinforce and share tag-combinations via thevisual similarity cues.

Thus, the digital content contextual tagging system can determine (e.g.,by utilizing user behavior data to mine correlated tag combinations)multi-term contextual tags and automatically associate (via propagation)the multi-term contextual tags with additional digital content. Bydetermining and associating multi-term contextual tags with digitalcontent, the digital content contextual tagging system can enable searchand retrieval of contextually relevant content from large collectionsthat accurately portrays context provided in a search query.

In one or more embodiments, the digital content contextual taggingsystem determines and associates multi-term contextual tags (and scores)with images using a correspondence between user search queries, tags ofthe images, and user selections of the images in response to the usersearch queries. Furthermore, in some embodiments, the digital contentcontextual tagging system identifies additional images based onsimilarities with the images associated with the multi-term contextualtags (e.g., using a k-nearest neighbor algorithm to cluster the digitalimages). Then, in one or more embodiments, the digital contentcontextual tagging system propagates the multi-term contextual tags tothe additional images based on a combination of tag scores and imagesimilarity scores. Moreover, in some embodiments, the digital contentcontextual tagging system provides images that are associated withmulti-term contextual tags in response to receiving search queries thatinclude such multi-term contextual tags.

As previously mentioned, the digital content contextual tagging systemcan utilize search query supervision to determine and associatemulti-term contextual tags and scores with images (e.g., utilizebehavioral signals of a user as weak labels for an image). For example,the digital content contextual tagging system can determine a multi-termcontextual tag from a search query (e.g., based on the terms in thesearch query). Additionally, the digital content contextual taggingsystem can identify a user selection of an image from search resultscorresponding to the search query. Then, the digital content contextualtagging system can associate the multi-term contextual tag with theselected image when the terms of the multi-term contextual tag includethe tags associated with the selected image. In one or more embodiments,the digital content contextual tagging system also generates a tag scorefor the multi-term contextual tag associated with the image.

Furthermore, the digital content contextual tagging system can propagatemulti-term contextual tags to one or more additional images. Inparticular, the digital content contextual tagging system can utilizeone or more multi-term contextual tags that are associated with one ormore images to propagate the multi-term contextual tags to one or moreadditional images. For instance, the digital content contextual taggingsystem can generate a cluster of images from a collection of images(e.g., utilizing a neural network and a k-nearest neighbor algorithm).Indeed, the cluster of images can include one or more images that areassociated with multi-term contextual tags and images that are similarto those images (e.g., visually similar).

Additionally, the digital content contextual tagging system can identifyimages that have multi-term contextual tags (from the cluster). Then,the digital content contextual tagging system can utilize scorescorresponding to such images and/or such multi-term contextual tags(e.g., tag scores and similarity scores) to generate aggregated scoresfor the multi-term contextual tags belonging to the cluster (e.g., byweighting the scores). Indeed, the digital content contextual taggingsystem can utilize the aggregated scores and/or other characteristics ofthe multi-term contextual tags (e.g., tag size) to rank the multi-termcontextual tags. Furthermore, the digital content contextual taggingsystem can filter (or prune) the multi-term contextual tags based on therankings to determine a final set (and/or list) of multi-term contextualtags for the cluster of images. Indeed, the digital content contextualtagging system can associate the final set of multi-term contextual tagswith images from the cluster (e.g., which includes the additionalimages).

Furthermore, the digital content contextual tagging system can provideimages that correspond to multi-term contextual tags as search results.For example, the digital content contextual tagging system can receive asearch query and identify a multi-term contextual tag that matches thesearch query. Then, in one or more embodiments, the digital contentcontextual tagging system identifies one or more images that include theidentified multi-term contextual tag. Upon identifying the one or moreimages, the digital content contextual tagging system can rank theimages based on scores associated with the images and/or scores of themulti-term contextual tag corresponding to the images. Moreover, thedigital content contextual tagging system can provide the one or moreimages based on the rankings as search results for the search query.

The digital content contextual tagging system of one or moreimplementations of the present disclosure provides advantages andbenefits over conventional systems and methods by determining multi-termcontextual tags for digital content utilizing search query supervisionand propagating the multi-term contextual tags to additional neighboringdigital content. For instance, by determining multi-term contextual tagsthat are contextually relevant to digital content and propagating suchtags to additional similar digital content, the digital contentcontextual tagging system can enable increased accuracy and efficiencyin searching for and tagging digital content within large collections ofdigital content.

In particular, by determining multi-term contextual tags that arecontextually relevant to digital content, the digital content contextualtagging system can provide digital content with tags that maintaincontext between one or more concepts portrayed in the digital content.Indeed, by determining such multi-term contextual tags for digitalcontent, the digital content contextual tagging system can accuratelyidentify digital content that is more relevant to specific contextpresented in a search query compared to some conventional systems. As aresult, the digital content contextual tagging system can enable usersto search for digital content from large collections of digital contentwith more specificity (e.g., with search queries that describe aspecific scenario) and provide content that is relevant to the specificsearch request. In addition, the digital content contextual taggingsystem enables increased efficiency by decreasing the number of searchqueries (and the computational resources corresponding to those searchqueries) by providing more relevant search results due to the determinedmulti-term contextual tags (e.g., by reducing the number of repeatedsearch requests).

Furthermore, by propagating the multi-term contextual tags to additionalneighboring digital content utilizing weighted aggregate tag scores, thedigital content contextual tagging system can accurately and efficientlytag a large collection of digital content with relevant multi-termcontextual tags. For example, by propagating the multi-term contextualtags to additional tags, the digital content contextual tagging systemefficiently determines multi-term contextual tags for digital contentthat may not have such tags and/or may receive infrequent user attention(e.g., helping search systems with cold-start problems for new and/orrare content). Furthermore, by propagating the multi-term contextualtags to the additional digital content while utilizing weightedaggregate tag scores for the multi-term contextual tags, the digitalcontent contextual tagging system can enable accurate searching within alarge collection of digital content based on specific search queriesthat request a specific context. As mentioned above, some conventionaldigital visual media systems, in contrast, fail to accurately andefficiently determine and propagate tags that have contextual relevanceto digital content.

As illustrated by the foregoing discussion, the present disclosureutilizes a variety of terms to describe features and advantages of thedigital content contextual tagging system. Additional detail is nowprovided regarding the meaning of such terms. For example, as usedherein, the word “digital content item” (sometimes referred to as“content item” or “digital media content item”) can refer to any digitalvisual representation of an object, scene, story, event, picture,illustration, icon, symbol, and/or other content. As an example, adigital content item can include, but is not limited to, a digitalimage, a digital video, and/or electronic document. Indeed, the word“digital image” (sometimes referred to as “image”) can include, but isnot limited to, a digital file with the following extensions: JPG, TIFF,BMP, PNG, RAW, or PDF. Moreover, the word “digital video” can include,but is not limited to, a digital file with the following fileextensions: FLV, SWF, AVI, WMV, MOV, QT, MKV, MP4, or AVCHD.

Furthermore, as used herein, the word “tag” can refer to a description(or information) including one or more terms and/or values. Inparticular, the word “tag” can refer to a description, that representsan object, scene, attribute, and/or another aspect (e.g., verbs, nouns,adjectives, etc.) portrayed in a digital content item (e.g., a digitalimage), with terms and/or values (e.g., a keyword). Indeed, the word“tag” can refer to conceptual labels (i.e., textual keywords) used todescribe image attributes. As an example, a tag can include text withinmetadata for a digital media content item. Additionally, a tag caninclude text from a vocabulary (or dictionary). Moreover, as usedherein, the word “tag characteristic” can refer to informationindicating one or more attributes of a tag. In particular, the word “tagcharacteristic” can refer to information such as a tag size, tagcomplexity, and/or tag language. Furthermore, as used herein, the word“tag size” can refer to the length of a tag. In particular, the word“tag size” can refer to the length of a tag in regard to the number ofcharacters of a tag and/or the number of terms in a tag.

As used herein, the word “multi-term contextual tag” can refer to a tagthat includes a plurality of terms that represent a concept. Inparticular, the word “multi-term contextual tag” can refer to a tag thatincludes a plurality of terms that represent a concept based on arelation between the plurality of terms. Moreover, the word “multi-termcontextual tag” can refer to a combination of tags which together form afine-grained conceptual understanding of visual attributes of an image.For instance, a multi-term contextual tag can include a tag withmultiple terms that represent and/or portray a specific concept (and/orscene) based on the order of the multiple terms within the tag. Indeed,a multi-term contextual tag can include a combination of tags and/orn-grams (e.g., in a specific order). As an example, a multi-termcontextual tag can include a tag such as “red-hat,” “yellow-shirt,”“Christmas-tree,” “a woman with a red dress and blue hat,” “a personwearing a white animal shirt.”

As used herein, the word “search query” can refer to a string ofcharacters and/or terms that are provided to a search engine. Inparticular, the word “search query” can refer to a string of charactersand/or terms provided by a user into a search engine in order toretrieve digital content. Furthermore, as used herein, the word “userselection” can refer to a user interaction that indicates a choice of auser. For example, a user selection can include mouse click and/or touch(e.g., on a touch screen) on a digital content item.

As used herein, the word “tag score” (sometimes referred to as a“multi-term contextual tag score”) can refer to a value that representsa confidence and/or relevance of tag. In particular, the word “tagscore” can refer to a value that represents a confidence and/orrelevance of a tag (e.g., a multi-term contextual tag) in relation to adigital content item. For instance, a tag score can represent aconfidence and/or relevance value that indicates the likelihood of a tagbelonging to a digital content item. For example, a tag score can be anumerical value such as “0.95” for a multi-term contextual tag (e.g., “awoman wearing a red dress and a blue hat”) for an image that portrays awoman wearing a red dress and a blue hat because the multi-termcontextual tag represents the image. Furthermore, a tag score can bebased on a selection frequency.

As used herein, the word “selection frequency” can refer to a number oftimes one or more users select a digital content item. In particular,the word “selection frequency” can refer to a number of times one ormore users select a digital content item in response to search query(e.g., a query-click frequency). Furthermore, a selection frequency canrepresent the number of times one or more users select a digital contentitem in response to a search query belonging to a multi-term contextualtag. Indeed, the selection frequency can include a click-through rate.

Additionally, as used herein, the word “aggregated score” (sometimesreferred to as an “aggregated multi-term contextual tag score,”“aggregated tag score,” or “aggregate score”) can refer to weightedand/or a combination one or more tag scores belonging to a tag (e.g., amulti-term contextual tag). In particular, the word “aggregated score”can refer to weighted and/or a combination of one or more tag scoresbelonging to a multi-term contextual tag from one or more digitalcontent items that indicates an illustrative multi-term contextual tagscore across the one or more digital items that include the one or moretag scores belonging to the multi-term contextual tag.

As used herein, the word “neural network” can refer to a machinelearning model that can be tuned (e.g., trained) based on inputs toapproximate unknown functions. In particular, the word “neural network”can include a model of interconnected layers that communicate andanalyze attributes at varying degrees of abstraction to learn toapproximate complex functions and generate outputs based on a pluralityof inputs provided to the model. For instance, the word “neural network”includes one or more machine learning algorithms (or models). Inparticular, the word “neural network” includes deep convolutional neuralnetworks (e.g., “CNNs”) and fully convolutional neural networks (e.g.,“FCNs”). In other words, a neural network includes an algorithm thatimplements deep learning techniques, i.e., machine learning thatutilizes a set of algorithms to attempt to model high-level abstractionsin data.

As used herein, the word “descriptor” can refer to a set of valuesrepresenting characteristics and/or attributes (i.e., features) ofcontent such as a digital image. In particular, the word “descriptor”includes a set of values corresponding to latent and/or patentattributes and/or characteristics (i.e., visual features) related todigital content (e.g., an image signature and/or feature vector). Forinstance, a descriptor can include a floating point vector in a higherdimensional space for a digital image extracted using a neural network.

As used herein, the word “cluster” can refer to a grouping representedby a relationship between digital content. In particular, the word“cluster” can refer to a grouping represented by a relationship betweenone or more characteristics and/or attributes (e.g., descriptors) ofdigital content. For example, a cluster can include a grouping ofdigital content that are semantically similar (based on descriptors ofthe images) in a feature space. For instance, a cluster can include agroup or set of digital images that are identified as neighborsutilizing a k-nearest neighbor algorithm.

As used herein, the word “k-nearest neighbor algorithm” can refer to amethod for clustering digital content (utilizing classification and/orregression) based on descriptors corresponding to the digital content.For example, a k-nearest neighbor algorithm can determine distancesbetween digital content features and a selected class (or attribute) ina feature space to cluster a select number (e.g., a k number) of digitalcontent that is nearest to the selected class. As used herein, the word“distance value” (sometimes referred to as “distance”) can refer to avalue that represents the amount of space between a digital content itemand a center of a cluster within a feature space. Furthermore, the word“distance value” can refer to one or more values representingquantifications of similarities between a plurality of features ofdigital content items. For instance, a distance value can include avalue that represents the amount of space between neighboring digitalcontent items within a cluster (e.g., based on a feature space of thecluster).

As used herein, the word “digital content item similarity score”(sometimes referred to as “similarity score” or “digital imagesimilarity score”) can refer to a value that represents a confidencevalue for the similarity between digital content and/or between digitalcontent and a feature represented by a cluster. In particular, thedigital content item similarity score can be a confidence score thatcorresponds to how closely a digital content item belongs to a clusterof digital content (e.g., based on distance values).

Furthermore, as used herein, the word “ranking score” (sometimesreferred to as a “ranking”) can refer to a value and/or ordering thatrepresents a position of an item relative to other items. In particular,the word “ranking score” can refer to a value and/or ordering thatrepresents a hierarchical position of a multi-term contextual tag inrelation to other multi-term contextual tags based on the relevance ofthe multi-term contextual tags to a digital content item and/or clusterof digital content. For instance, a ranking score can include anormalized score (from 0 to 1) for multi-term contextual tags thatdetermines a hierarchical position for the multi-term contextual tags ina list or set (e.g., 0 being the lowest rank and 1 being the highestrank).

Turning now to the figures, FIG. 1 illustrates a schematic diagram ofone embodiment of an exemplary environment 100 in which a digitalcontent contextual tagging system 106 can operate. As illustrated inFIG. 1, the exemplary environment 100 includes server device(s) 102, anetwork 108, and a client device 110. As further illustrated in FIG. 1,the server device(s) 102 and the client device 110 can communicate viathe network 108. Although FIG. 1 illustrates the server device(s) 102and the client device 110 communicating via the network 108, the variouscomponents of the environment 100 can communicate and/or interact viaother methods (e.g., the server device(s) 102 and the client device 110can communicate directly). Furthermore, although FIG. 1 illustrates thedigital content contextual tagging system 106 being implemented by aparticular component and/or device within the environment 100, thedigital content contextual tagging system 106 can be implemented, inwhole or in part, by other computing devices and/or components in theenvironment 100.

As shown in FIG. 1, the server device(s) 102 can include a digitalvisual media system 104 which further includes the digital contentcontextual tagging system 106. In particular, the digital contentcontextual tagging system 106 can determine multi-term contextual tagsand/or associate multi-term contextual tags with digital content itemsutilizing search query supervision in accordance with one or moreembodiments herein. Furthermore, the digital content contextual taggingsystem 106 can propagate one or more multi-term contextual tagsbelonging to one or more digital content items to other digital contentitems within a collection of digital content utilizing clustering and/orweighted tag scores in accordance with one or more embodiments herein.Additionally, the digital content contextual tagging system 106 canutilize the determined and/or propagated multi-term contextual tagsbelonging to the digital content items to enable functionalities for thedigital content items (e.g., search capabilities for images having oneor more multi-term contextual tags) in accordance with one or moreembodiments herein. Furthermore, the server device(s) 102 (e.g., via thedigital content contextual tagging system 106) can store digital content(e.g., digital images and/or digital videos) with correspondingmulti-term contextual tags. Moreover, the server device(s) 102 caninclude a variety of types of computing devices, including thoseexplained below with reference to FIG. 9.

Additionally, as mentioned above and as shown in FIG. 1, the environment100 includes the client device 110. In one or more embodiments, theclient device 110 may include, but is not limited to, a mobile device(e.g., smartphone, tablet), a laptop, a desktop, or any other type ofcomputing device, including those explained below with reference to FIG.9. Furthermore, although not shown in FIG. 1, the client device 110 canbe operated by a user to perform a variety of functions. In particular,the client device 110 can perform functions such as, but not limited to,creating, storing, uploading, and/or modifying a variety of digitalcontent items (e.g., a digital image). For example, the client device110 can communicate with the server device(s) 102 via the network 108 toprovide one or more digital images to the server device(s) 102.Additionally, the client device 110 can interact with digital images onthe server device(s) 102 and/or conduct search queries for digitalimages on the server device(s) 102 and/or the network 108. For example,the client device can conduct a search query, receive one or more resultimages in response to the search query, and select one or more imagesfrom the result images. Although FIG. 1 illustrates the environment withthe client device 110, the environment 100 can include a plurality ofclient devices.

Additionally, as shown in FIG. 1, the exemplary environment 100 includesthe network 108. As mentioned above, the network 108 can enablecommunication between components of the environment 100. In one or moreembodiments, the network 108 may include the Internet or World Wide Web.Additionally, the network 108 can include various types of networks thatuse various communication technology and protocols, such as a corporateintranet, a virtual private network (VPN), a local area network (LAN), awireless local network (WLAN), a cellular network, a wide area network(WAN), a metropolitan area network (MAN), or a combination of two ormore such networks. Indeed, the server device(s) 102, the client device110, and the network 108 may communicate using any communicationplatforms and technologies suitable for transporting data and/orcommunication signals, including any known communication technologies,devices, media, and protocols supportive of data communications,examples of which are described with reference to FIG. 9.

As mentioned above, the digital content contextual tagging system 106can utilize search query supervision to determine and associatemulti-term contextual tags and scores with images. For example, theflowchart illustrated in FIG. 2 provides an overview of the digitalcontent contextual tagging system 106 determining and associatingmulti-term contextual tags with digital images. A more detaileddescription of the digital content contextual tagging system 106determining and associating multi-term contextual tags utilizing searchquery supervision is discussed in reference to FIG. 4.

As shown in FIG. 2, the digital content contextual tagging system 106can receive search queries 202 from a client device. Moreover, asillustrated in FIG. 2, the digital content contextual tagging system 106can provide digital image search results 206 in response to the searchqueries 202. Then, the digital content contextual tagging system 106 canidentify (or detect) selected digital images 208 from user selections ofone or more of the digital image search results 206 from a clientdevice.

Additionally, as shown in FIG. 2, the digital content contextual taggingsystem 106 can determine a search query n-gram 204 as the multi-termcontextual tag. Moreover, as illustrated in FIG. 2, the digital contentcontextual tagging system 106 can identify image tags 210 correspondingto the selected digital images 208. Then, in reference to FIG. 2, thedigital content contextual tagging system 106 can perform an act 212 ofmatching the search query n-gram 204 and the image tags 210 of theselected digital images 208 to determine which selected images toassociate with the multi-term contextual tag (to result in the selecteddigital images associated with multi-term contextual tag 214). Inaddition, the digital content contextual tagging system 106 cangenerate, update, and/or include a tag score for the multi-termcontextual tag for the selected digital images associated with themulti-term contextual tag 214 in accordance with one or more embodimentsherein.

Furthermore, as shown in FIG. 2, the digital content contextual taggingsystem 106 includes the selected digital images that are associated withthe multi-term contextual tags 214 into an image index 216. Indeed, thedigital content contextual tagging system 106 can include tag scorescorresponding to the selected digital images that are associated withthe multi-term contextual tag 214 in the image index 216. Furthermore,the image index 216 can include a variety of images that includemulti-term contextual tags, other tags, and/or no tags (e.g., nomulti-term contextual tags). Moreover, the digital content contextualtagging system 106 can also provide search results for search queries(e.g., search query 202) from the image index 216.

Furthermore, as previously mentioned, the digital content contextualtagging system 106 can automatically propagate one or more multi-termcontextual tags existing in a collection of images to additional imageswithin the collection. For instance, FIG. 3 illustrates a flowchart thatprovides an overview of the digital content contextual tagging system106 propagating multi-term contextual tags to additional digital images.Additionally, FIG. 3 also illustrates an overview of the digital contentcontextual tagging system 106 utilizing multi-term contextual tags toprovide digital images in response to search queries. A more detaileddescription of the digital content contextual tagging system 106propagating multi-term contextual tags to additional digital images isdiscussed in reference to FIGS. 5A and 5B.

As illustrated in FIG. 3, the digital content contextual tagging system106 can cluster digital images in act 302 from the image index 216(e.g., the image index 216 of FIG. 2). The digital image clusters caninclude digital images that are similar to each other (e.g., k-nearestneighbors). Indeed, the digital content contextual tagging system 106can generate any number of clusters for digital images for any number ofimages in act 302. A more detailed description of the digital contentcontextual tagging system 106 generating clusters is described ingreater detail in FIG. 5A.

Moreover, the digital content contextual tagging system 106 can utilizethe clusters to propagate multi-term contextual tags to additionaldigital images. For instance, as shown in FIG. 3, the digital contentcontextual tagging system 106 can identify digital images withmulti-term contextual tags (and corresponding tag scores and/orsimilarity scores) in act 304 from within a cluster of images (of act302). Moreover, the digital content contextual tagging system 106 cangenerate, from the identified digital images of act 304, aggregatedscores for the multi-term contextual tags in act 306. For instance, thedigital content contextual tagging system 106 can provide weights to theaggregated scores (of act 306) utilizing various factors such as the tagscores and/or similarity scores corresponding to the identified digitalimages (of act 304). A more detailed description of the digital contentcontextual tagging system 106 identifying digital images that includemulti-term contextual tags from a cluster of images and/or aggregatingscores for multi-term contextual tags corresponding to the identifieddigital images is described in greater detail in FIG. 5B.

Furthermore, as shown in FIG. 3, the digital content contextual taggingsystem 106 can rank the multi-term contextual tags that have aggregatedscores (from act 306). In one or more embodiments, the digital contentcontextual tagging system 106 ranks the multi-term contextual tags basedon the aggregated scores and/or other characteristics of the multi-termcontextual tags. In particular, the multi-term contextual tags can beranked based on the aggregated scores and/or other characteristics ofthe multi-term contextual tags as described in greater detail in FIG.5B.

Moreover, as illustrated in FIG. 3, the digital content contextualtagging system 106 can filter and associate multi-term contextual tagsin act 310 to the clustered images (of act 302) by utilizing therankings from act 308. In particular, the digital content contextualtagging system 106 can utilize the rankings of the multi-term contextualtags to determine a final set (or list) of multi-term contextual tags.Then, the digital content contextual tagging system 106 can propagatethe multi-term contextual tags to the cluster of images by associatingthe list of multi-term contextual tags to the digital images from thecluster of images (of act 302). A more detailed description of thedigital content contextual tagging system 106 filtering and associatingmulti-term contextual tags with additional digital images is describedin greater detail in FIG. 5B. Furthermore, as shown in FIG. 3, thedigital content contextual tagging system 106 can provide the digitalimages and the associated multi-term contextual tags from act 310 to theimage index 216.

Moreover, the digital content contextual tagging system 106 can providedigital images as search results based on multi-term contextual tags.For example, as shown in FIG. 3, the digital content contextual taggingsystem 106 can receive a search query 312. Additionally, as shown inFIG. 3, the digital content contextual tagging system 106 can utilize asearch engine 314 to identify one or more digital images from the imageindex 216 by utilizing multi-term contextual tags corresponding to theone or more digital images and the search query 312. Furthermore, thedigital content contextual tagging system 106 can utilize a rankingmodule 316 to rank the one or more digital images identified by thesearch engine 314 (e.g., based on aggregated tag scores corresponding tothe one or more digital images). Additionally, as shown in FIG. 3, thedigital content contextual tagging system 106 can provide the resultdigital images 318, that include multi-term contextual tags that matchthe search query 312, based on the ranking. A more detailed descriptionof the digital content contextual tagging system 106 providing digitalimages corresponding to multi-term contextual tags in response to searchqueries is discussed in reference to FIG. 6.

As previously mentioned, the digital content contextual tagging system106 can determine and associate one or more multi-term contextual tagswith one or more images. For instance, FIG. 4 illustrates the digitalcontent contextual tagging system 106 determining and associating one ormore multi-term contextual tags with one or more images. In particular,FIG. 4 illustrates the digital content contextual tagging system 106utilizing search query supervision to determine multi-term contextualtags and associating the one or more multi-term contextual tags with oneor more images from the search results.

For example, as shown in FIG. 4, the digital content contextual taggingsystem 106 can receive a search query in an interface 402 (e.g., “personwith animal on white shirt”). Additionally, as illustrated in FIG. 4,the digital content contextual tagging system 106 can provide digitalimages as search results in response to the search query in theinterface 402. Indeed, as shown in FIG. 4, the digital contentcontextual tagging system 106 provides digital images that include tagsrelated to one or more terms in the search query.

As an example, FIG. 4 illustrates the digital content contextual taggingsystem 106 providing digital images portraying an animal, personswearing white hats and grey shirts, and persons wearing white shirtswith animals on the shirts in the interface 402 (e.g., based on tagsassociated with the digital image and in response to the search query).As previously mentioned, conventional independent tags often fail toenable efficient and accurate searching and/or retrieval of desiredimages with the search query context intact (e.g., the search query ininterface 402 returns images portraying an animal and persons with whitehats and grey shirts in response to the search query having the terms“animal,” “person,” “white,” and “shirt”).

Moreover, as shown in FIG. 4, the digital content contextual taggingsystem 106 can detect user selections of digital image search results.In particular, the digital content contextual tagging system 106identifies selected images 406 from user selections within the interface402. As illustrated in FIG. 4, the digital content contextual taggingsystem 106 identifies user selections of the digital images portraying a“person with animal on white shirt” from the image search results as theselected images 406. Additionally, as shown in FIG. 4, the digitalcontent contextual tagging system 106 also identifies a search queryn-gram 404 from the search query in the interface 402.

Then, as illustrated in FIG. 4, the digital content contextual taggingsystem 106 can match (in act 410) the tags associated with the selectedimages 406 with the search query n-gram 404 to determine which imagesfrom the selected images 406 to associate with a multi-term contextualtag determined from the search query. For instance, as shown in FIG. 4,the digital content contextual tagging system 106 determines that theselected images 406 include the terms from the search query n-gram 404(in act 410). As such, FIG. 4 illustrates the digital content contextualtagging system 106 associating images with a multi-term contextual tag414 (e.g., “person with animal on white shirt”).

Furthermore, as shown in FIG. 4, the digital content contextual taggingsystem 106 can determine multi-term contextual tag scores for theselected images. For example, as illustrated in FIG. 4, the digitalcontent contextual tagging system 106 can identify user interactioninformation 408 such as user selections in response to the search queryfrom interface 402. Moreover, as shown in FIG. 4, the digital contentcontextual tagging system 106 can utilize the user interactioninformation 408 to determine multi-term contextual tag scores in act 412for selected images (e.g., user click frequencies). Indeed, asillustrated in FIG. 4, the digital content contextual tagging system 106can associate tag scores with the images with the multi-term contextualtag 414 (e.g., “0.87” and “0.9” represent a user selection frequencyscore associated with the selected images and the correspondingmulti-term contextual tag).

As previously mentioned, the digital content contextual tagging system106 utilizes a search query to determine and/or associate multi-termcontextual tags to one or more digital images (e.g., the search query inthe interface 402 in FIG. 4). Indeed, the digital content contextualtagging system 106 can receive a search query that includes any stringof text. Furthermore, the digital content contextual tagging system 106can utilize a search engine to provide one or more search results basedon the string of text of the search query. For instance, the digitalcontent contextual tagging system 106 can provide one or more imagesthat include independent tags and/or multi-term contextual tags thatmatch the search query.

Moreover, the digital content contextual tagging system 106 can utilizethe search query to determine a multi-term contextual tag. For example,in one or more embodiments, the digital content contextual taggingsystem 106 utilizes the entire string of text of the search query as amulti-term contextual tag. For instance, the multi-term contextual tagcan be an entire sentence and/or phrase provided as a search query. Insome embodiments, the digital content contextual tagging system 106creates a multi-term contextual tag from a search query n-gramdetermined from the search query.

For instance, the digital content contextual tagging system 106 candetermine an n-gram from a search query (e.g., search query n-gram). Forexample, the digital content contextual tagging system 106 can utilizean n-gram model to determine one or more sequences stemming from text ofa search query (e.g., from a text string). In some embodiments, thedigital content contextual tagging system 106 utilizes the search queryn-gram sequence to correct spelling and/or other typos within the searchquery. In particular the digital content contextual tagging system 106can utilize an n-gram model to segment the search query into one or moresequences of words and find an n-gram sequence that is likely to matchthe search query from a corpus of n-grams (e.g., based on a probabilityof occurrence of the sequence of words and overlap between the sequenceand the n-gram from the corpus).

Moreover, the digital content contextual tagging system 106 can utilizethe determined n-gram as the multi-term contextual tag. Furthermore, thedigital content contextual tagging system 106 can utilize various n-gramsizes (e.g., a 2-gram, 3-gram, 9-gram, etc.) of a search query todetermine (or generate) one or more multi-term contextual tags from thesearch query. For instance, in reference to FIG. 4, the digital contentcontextual tagging system 106 can generate a 6-gram sequence for thesearch query (e.g., “person with animal on white shirt” as search queryn-gram 404). Additionally, the digital content contextual tagging system106, in reference to FIG. 4, can also generate other sizes of n-gramsfor the search query (e.g., 4-gram sequences that include “person withanimal on,” “with animal on white,” and “animal on white shirt”).

Additionally, the digital content contextual tagging system 106 canidentify user selections of images from image search results. Inparticular, the digital content contextual tagging system 106 canidentify one or more images that are selected by a user in response to asearch query. The digital content contextual tagging system 106 can alsoidentify other user interactions with regards to the images from animage search result. For instance, the digital content contextualtagging system 106 can identify interactions such as feedback (e.g.,marking an image as relevant and/or irrelevant), bookmarking an image,saving an image from the search results, purchasing an image from thesearch results, and/or sharing an image from the search results.

Furthermore, upon identifying user selections of (or other userinteractions with) one or more images from an image search result, thedigital content contextual tagging system 106 can identify informationfor the one or more selected digital images. For instance, the digitalcontent contextual tagging system 106 can identify tags that areassociated with the one or more digital images selected by a user. Forinstance, the digital content contextual tagging system 106 can identifyone or more independent tags associated with each digital image of theone or more selected digital images. Furthermore, the digital contentcontextual tagging system 106 can also identify multi-term contextualtags that are associated with the one or more selected images (e.g.,multi-term contextual tags that may have been determined earlier and/orpreviously propagated to one or more images by the digital contentcontextual tagging system 106).

Additionally, the digital content contextual tagging system 106 canassociate multi-term contextual tags upon identifying user selections of(or other user interactions with) one or more images from an imagesearch result. In particular, the digital content contextual taggingsystem 106 can compare the search query (and/or search query n-gram) andtags (or other information) associated with the one or more selectedimages from the search results to determine which selected image will beassociated with a multi-term contextual tag. For example, the digitalcontent contextual tagging system 106 can associate an image with amulti-term contextual tag (determined from the search query) if theimage tags include all of the terms present in the search query. In someembodiments, the digital content contextual tagging system 106associates an image with a multi-term contextual tag if the image tagsinclude a threshold percentage of the terms present in the search query(e.g., if 90% of the search query terms are included as tags for thedigital image).

Furthermore, the digital content contextual tagging system 106 cancompare the tags of the digital image with the significant keywords of asearch query. For instance, the digital content contextual taggingsystem 106 can determine, utilizing a natural language processingtechnique, significant keywords within a search query. Then, the digitalcontent contextual tagging system 106 determines whether a selecteddigital image includes all of the significant keywords within the searchquery. Indeed, if the selected digital image does include all of thesignificant keywords determined in the search query, the digital contentcontextual tagging system 106 can associate a multi-term contextual tag(from the search query) to the selected digital image.

Moreover, upon matching the tags associated with a selected digitalimage and the terms of a search query (and/or terms of a multi-termcontextual tag resulting from the search query) using one or more of theapproaches discussed above, the digital content contextual taggingsystem 106 can associate the multi-term contextual tag with the selecteddigital image. For instance, digital content contextual tagging system106 can index the selected digital image to be associated withmulti-term contextual tag within an image index, such as image index216, (and/or a repository). Indeed, the multi-term contextual tag can beassociated with the digital image as metadata, as embedded information,as linked information, or by utilizing any other tagging techniques.

Additionally, the digital content contextual tagging system 106 candetermine a tag score for a digital image that includes a multi-termcontextual tag. In particular, the digital content contextual taggingsystem 106 can utilize one or more user interactions (e.g., based on auser behavioral log) with a digital image to assign and/or update a tagscore that corresponds to a multi-term contextual tag. For instance, thedigital content contextual tagging system 106 can determine aquery-click frequency for a digital image to assign and/or update a tagscore. Indeed, the digital content contextual tagging system 106 cantrack how often a digital image is selected, from one or more users, inresponse to a search query (e.g., a search query that corresponds to amulti-term contextual tag). Moreover, the digital content contextualtagging system 106 can utilize the number of times the digital image isselected in response to a search query to generate a tag score for themulti-term contextual tag (from the search query) for the selecteddigital image. Indeed, the digital content contextual tagging system 106can assign a tag score to a combination of a multi-term contextual tagand a digital image.

Furthermore, the digital content contextual tagging system 106 canutilize other user interactions to assign a tag score for a multi-termcontextual tag in correspondence to a digital image. For example, thedigital content contextual tagging system 106 can assign and/or updatethe tag score based on interactions such as bookmarking the digitalimage, saving the digital image within a collection of images associatedwith the multi-term contextual tag, purchasing the digital image, and/oruser feedback. Indeed, the digital content contextual tagging system 106can assign and/or update tag scores for one or more multi-termcontextual tags and their correspondences with one or more digitalimages utilizing the approaches described above. Furthermore, thedigital content contextual tagging system 106 can continuously tracksearch queries to update multi-term contextual tag scores associatedwith digital images when a digital image that includes a multi-termcontextual tag is selected by a user using a search query thatcorresponds to the multi-term contextual tag.

In one or more embodiments, the digital content contextual taggingsystem 106 utilizes rate of clicks as the multi-term contextual tagscore. In particular, the digital content contextual tagging system 106can utilize a rate of clicks (e.g., the frequency at which a digitalimage is selected in response to a search query corresponding to amulti-term contextual tag) as the tag score for a digital image. Indeed,the digital content contextual tagging system 106 can assign a varietyof types of tag scores to a digital image. For instance, the digitalcontent contextual tagging system 106 can utilize a percentage and/or anormalized score corresponding to a user-click frequency and/or someother user interaction as a multi-term contextual tag score for adigital image (e.g., a selection frequency).

Although FIG. 4 illustrates the digital content contextual taggingsystem 106 determining and associating one multi-term contextual tagwith the one or more digital images, the digital content contextualtagging system 106 can determine and associate multiple multi-termcontextual tags for a digital image. Furthermore, the digital imagesretrieved as part of a search request can include any number of tagsthat are relevant and/or not relevant to a search query. Moreover, thedigital content contextual tagging system 106 can determine andassociate one or more multi-term contextual tags to a digital imagebased on multiple search queries (e.g., for a similar topic and/or othertopic). Indeed, the digital content contextual tagging system 106 canutilize one or more digital images as results in separate search queriesand associate multi-term contextual tags corresponding to the separatesearch queries to the one or more digital images multiple times inaccordance with one or more embodiments herein.

Furthermore, the digital content contextual tagging system 106 canutilize search engine logs to determine multi-term contextual tags fordigital images and/or tag scores for the digital images. In particular,the digital content contextual tagging system 106 can aggregatemulti-term contextual tags determined from search queries and imagesselected in response to those search queries from a search engine log.Furthermore, the digital content contextual tagging system 106 canutilize such aggregated multi-term contextual tag and image combinationsto determine a click frequency (e.g., a query-image frequencydistribution) for each multi-term contextual tag that is determined tocorrespond to a digital image from the search engine logs. Moreover, thedigital content contextual tagging system 106 can utilize thequery-image frequency distribution to prune (e.g., select a final set ofmulti-term contextual tags for the digital images in the search queries)by using a frequency threshold. In particular, the digital contentcontextual tagging system can utilize the frequency threshold as ahyper-parameter utilized to control the quality and number of multi-termcontextual tags that are associated with the digital images from thesearch queries and/or search query logs.

Moreover, the digital content contextual tagging system 106 can utilizethe multi-term contextual tags and scores of digital images (determinedand associated in accordance with one or more embodiments herein) asground truth data (e.g., as a ground truth label set for an initial setof multi-term contextual tags). Furthermore, the digital contentcontextual tagging system 106 utilize the multi-term contextual tags andscores of digital images as ground truth data to train a model topredict multi-term contextual tags using a multi-label image classifier.

As mentioned above, the digital content contextual tagging system 106can generate a cluster of one or more images from a collection of imagesand propagate multi-term contextual tags to the images within thecluster. For example, FIG. 5A illustrates the digital content contextualtagging system 106 generating a cluster of images. Moreover, FIG. 5Billustrates the digital content contextual tagging system 106propagating one or more multi-term contextual tags to images within thecluster of images.

In particular, as shown in FIG. 5A, the access an image index 216 (e.g.,a collection of images) and utilize neural network 504 to generate imagedescriptors 506 for the images of the image index 216. Furthermore, asillustrated in FIG. 5A, the digital content contextual tagging system106 can utilize the image descriptors 506 to cluster images in act 508to generate an image cluster 510. For instance, as shown in FIG. 5A, theimage cluster 510 includes images (e.g., images portraying personswearing white shirts with animals depicted on the shirts) that aredetermined to be similar by the digital content contextual taggingsystem 106 utilizing one or more clustering techniques (e.g., k-nearestneighbor). Furthermore, as shown in FIG. 5A, the digital contentcontextual tagging system 106 can generate similarity scores (e.g.,based on K-nearest neighbor distance values) for the one or more imagesin the image cluster 510.

In one or more embodiments, the digital content contextual taggingsystem 106 utilizes an image index that includes one or more images thatinclude one or more multi-term contextual tags (determined in accordancewith one or more embodiments herein). Indeed, the digital contentcontextual tagging system 106 can utilize an image index that includes avariety of images that portray a number of objects, attributes, and/orscenarios. For instance, the digital content contextual tagging system106 can utilize a collection of images such as digital images fromADOBE® STOCK® (as the image index). In one or more embodiments, thedigital content contextual tagging system 106 can utilize digital imagesthat are uploaded to one or more online services (e.g., image sharingwebsites) and/or other image repositories (e.g., publicly available datasuch as publicly available images).

Furthermore, the digital content contextual tagging system 106 canutilize a neural network that is trained to generate one or more imagedescriptors for one or more images from a collection of images (e.g., animage index). In particular, the digital content contextual taggingsystem 106 can utilize a neural network to extract a semantic imagedescriptor (e.g., an image signature) for the one or more images fromthe collection of images. Indeed, the image descriptors can includefloating point vectors in a higher dimensional space that are learned(e.g., via the neural network) to capture semantic content of an imagesuch visually and semantically similar images are close to each other(e.g., close in distance in the higher dimensional space).

For example, in one or more embodiments, the digital content contextualtagging system 106 utilizes a neural network to generate feature vectors(as image descriptors) for the digital images in a collection of digitalimages as the image descriptors. Indeed, the digital content contextualtagging system 106 can utilize a neural network, such as a CNN, togenerate feature vectors by extracting features (e.g., visualcharacteristics and/or latent attributes) in different levels ofabstractions. Indeed, the neural network can generate feature vectorsfor a digital image by learning features and/or generating featurevectors for the features by utilizing neural network layers such as, butnot limited to, one or more convolution layers, one or more activationlayers (e.g., ReLU layers), one or more pooling layers, and/or one ormore fully connected layers. Furthermore, the digital content contextualtagging system 106 can utilize a neural network to generate multiplefeature vectors from each digital image (e.g., multiple feature vectorsfor various features learned from a digital image).

Moreover, in one or more embodiments, the digital content contextualtagging system 106 utilizes clustering algorithms (and/or techniques) tocluster digital images from a collection of digital images based onsemantic and/or visual similarities of the digital images (e.g., theimage descriptors corresponding to the digital images). For instance,the digital content contextual tagging system 106 can utilize clusteringtechniques such as, but not limited to, K-Means clustering and/orrecursive K-Means clustering to cluster the digital images (or imagedescriptors) from the collection of digital images into clusters of adesirable size based on the similarity of the digital images. Inparticular, the digital content contextual tagging system 106 cananalyze the one or more image descriptors generated from the collectionof images to identify image descriptors that are similar. Indeed, thedigital content contextual tagging system 106 can determine distancevalues between the image descriptors to identify similar imagedescriptors (e.g., to identify a cluster of similar images).

In one or more embodiments, the digital content contextual taggingsystem 106 utilizes a variety of methods to compare the one or moreimage descriptors to identify the similar image descriptors. Forexample, the digital content contextual tagging system 106 can utilizemethods (or algorithms) such as, but not limited to, k-nearest neighboralgorithm, cosine similarity calculations, other clustering techniques,and/or embedding spaces to compare the one or more image descriptors toidentify the similar image descriptors (e.g., to identify a cluster ofsimilar images). For instance, the digital content contextual taggingsystem 106 can utilize a k-nearest neighbor algorithm to determinedistance values (e.g., a Euclidean distance) between image descriptorswithin a higher dimensional space (e.g., a Euclidean space). Then, thedigital content contextual tagging system 106 can utilize a “k” numberof image descriptors (e.g., a number selected and/or configured by aneural network, user of the digital content contextual tagging system106, and/or the digital content contextual tagging system 106) based onthe determined distance values.

Indeed, the digital content contextual tagging system 106 can clusterdigital images (or image descriptors) that are similar to each otherbased on the distance value between the digital images and/or between adigital image and a center of a class or feature represented by acluster (e.g., a shorter distance value can indicate a strongersimilarity between digital images and/or a digital image and the centerof a cluster). In particular, the digital content contextual taggingsystem 106 can utilize a threshold distance value to select the digitalimages (e.g., select the image descriptors that have a distance valuethat meets a threshold distance value, set by a server administrator,the digital content contextual tagging system 106, and/or a machinelearning model) to generate a digital image cluster. For instance, adigital image cluster can include a “k” number of images that arenearest in distance (e.g., to each other and/or to cluster center thatrepresents a class and/or feature) within the higher dimensional space.

Additionally, the digital content contextual tagging system 106 can alsoutilize cosine similarity to generate the digital image cluster. In oneor more embodiments, the digital content contextual tagging system 106determines a cosine similarity measurement as a distance value betweenimage descriptors and/or between an image descriptor and a clustercenter. For instance, the digital content contextual tagging system 106can determine angles between image descriptors in a vector space andutilize the angles (or normalized values of the angles) as distancevalues between the image descriptors. Moreover, the digital contentcontextual tagging system 106 can also determine angles between imagedescriptors and centers of one or more clusters in a vector space andutilize the angles as distance values between the image descriptors andthe centers of the one or more clusters. Indeed, the digital contentcontextual tagging system 106 can utilize these distance values (e.g.,the cosine similarity measurements) to identify image descriptors thatare similar to each other and/or to a center of a cluster to generate animage cluster (e.g., a lesser angle measurement can indicate a strongersimilarity between the image descriptors and/or between the imagedescriptors and a center of a cluster).

In addition to identifying similar image descriptors to generate animage cluster based on one or more methods described above, the digitalcontent contextual tagging system 106 can also determine a degree ofsimilarity between the digital images and/or between the digital imagesand a center of a cluster. For instance, the digital content contextualtagging system 106 can use the distance values determined between imagedescriptors (or images) and cluster centers (e.g., the distance value asdescribed above) as the degree of similarity between a digital image anda cluster class. Moreover, the digital content contextual tagging system106 can utilize this degree of similarity between the digital image anda cluster class to generate an image cluster (e.g., select the topthreshold number of digital images based on the nearest distance valuesbetween the digital images and a cluster center).

Furthermore, the digital content contextual tagging system 106 canutilize the degree of similarity between the digital images and acluster center to determine a confidence score indicating how confidentthe digital content contextual tagging system 106 is that a digitalimage should belong to a particular cluster (e.g., as the digital imagesimilarity score). In one or more embodiments, the digital contentcontextual tagging system 106 normalizes the distance values to a scalebetween 0 and 1 or 1 and 100 to determine the digital image similarityscores. Furthermore, the digital content contextual tagging system 106can determine the similarity score based on a distance value determinedbetween a cluster center and a digital image and/or a distance valuebetween multiple digital images within a digital image cluster.

Moreover, the digital content contextual tagging system 106 can utilizea neural network to generate image descriptors that are floating pointvectors in a higher dimensional space that can be clustered into pseudoclasses determined from one or more digital images and/or tagscorresponding to the digital images. For instance, the digital contentcontextual tagging system 106 can utilize a neural network to determinetag-driven pseudo classes. In particular, the digital content contextualtagging system 106 can utilize a pseudo tag prediction task to learnhigh dimensional semantic features for images to generate the K-nearestneighbors. For example, the digital content contextual tagging system106 can train a neural network with a large-scale image data set that isweakly annotated with contributor tags (i.e., the original, non-combinedtags provided by users and/or annotators). Furthermore, the digitalcontent contextual tagging system 106 can utilize a pseudo labelingtechnique to reduce the class space while training the neural network.

In particular, the digital content contextual tagging system 106 canutilize images I₁, I₂, . . . , I_(n)∈I (e.g., in a set of images I).Moreover, each image I_(i) has m_(i) tags T^(i)={t₁ ^(i), t₂ ^(i), . . ., t_(m) ^(i)}. Furthermore, the digital content contextual taggingsystem 106 can define a set of all possible tags as U={u₁, u₂, . . . ,u_(M)}. Then, the digital content contextual tagging system 106 canrepresent tags of each image I_(i) to an M dimensional binary vectorb^(i) in accordance with the following:

$b_{j}^{i} = \begin{matrix}{{1\mspace{14mu} {when}\mspace{14mu} u_{j}} \in T^{i}} \\{0\mspace{14mu} {otherwise}}\end{matrix}$

In particular, the j^(th) entry of the vector b^(i) is 1 only when theimage I_(i) has a tag u_(j). Furthermore, the digital content contextualtagging system 106 can apply normalization terms to all vectors b^(i)with consideration of tf (term frequency), idf (inverse documentfrequency), and L₂ norms of the vectors. In particular, the idf_(i) ofeach tag u_(i) is defined in accordance with the following:

${idf_{i}} = {\log \frac{n}{{occurence}\mspace{14mu} {of}\mspace{14mu} u_{i}}}$

Moreover, the digital content contextual tagging system 106 can utilizethe term frequency (e.g., from the tags of images) to normalize varyingnumber of tags for each of the images. Additionally, the digital contentcontextual tagging system 106 can utilize the inverse document frequency(from above) to assign higher importance to more informative tags sinceless common tags are more informative (e.g., “Eiffel Tower” is moreinformative compared to “architecture”). Furthermore, the digitalcontent contextual tagging system 106 can define a Bag of Tags (BoT)representation of each image in accordance with the following:

$x_{j}^{i} = \begin{matrix}{{\frac{{idf}_{i}}{m_{i}}\mspace{14mu} {when}\mspace{14mu} u_{j}} \in T^{i}} \\{0\mspace{14mu} {otherwise}}\end{matrix}$

Moreover, the digital content contextual tagging system 106 cannormalize x^(i) according to the L₂ norm of ∥x^(i)∥. Additionally, thedigital content contextual tagging system 106 can perform k-meansclustering to the x^(i) vectors (e.g., to form pseudo classes c_(i)). Inone or more embodiments, the digital content contextual tagging system106, during the clustering stage, utilizes an inverted representationfor x^(i) because the vectors are very sparse vectors. For instance, thenumber of total tags M is usually very large (e.g., more than a hundredthousand tags) and the number of tags m_(i) of each image I_(i) is oftenless than a hundred. Moreover, the digital content contextual taggingsystem 106 can utilize pseudo classes c_(i) as clusters. For instance,the digital content contextual tagging system 106 can represent thecentroid of the i^(th) class (e.g., the pseudo classes) as c_(i)∈

^(M). In some embodiments, the pseudo classes are weighted combinationsof tags. Moreover, the digital content contextual tagging system 106 canutilize the K pseudo classes has hyperparameters to control thegranularity of the visual concepts (e.g., K can be in the range of 5000to 10000 for a training data set in the range of 5-10 million images).Furthermore, the digital content contextual tagging system 106 canutilize images and their pseudo class indices to place visually andsemantically similar images close to each other to form an imagecluster.

As an example, the digital content contextual tagging system 106 canutilize image tags corresponding to images (e.g., I₁={t₁ ¹, t₂ ¹, . . .}, I₂={t₁ ², t₂ ², . . . }, . . . , I_(n)={t₁ ^(n), t₂ ^(n), . . . }) togenerate M dimensional sparse bag of tags vectors (e.g., x₁=[0, 1, 1, 0,. . . ], x₂=[1, 0, 0, 0, . . . ], . . . , x_(n)=[0, 0, 1, 1, . . . ]).Moreover, the digital content contextual tagging system 106 can applynormalization terms to the M dimensional sparse bag of tag vectors(e.g., x₁, x₂, . . . , x_(n)) with consideration of term frequency,inverse document frequency, and L₂ norms of the vectors to cluster theimage vectors into k pseudo classes.

Furthermore, the digital content contextual tagging system 106 canutilize the training images and their pseudo class indices to train aclassification neural network with images and label pairs. For instance,the digital content contextual tagging system 106 can utilize aResNet-50 network (e.g., a randomly initialized ResNet-50 network) totrain a softmax classification loss on the pseudo classes. Then, thedigital content contextual tagging system 106 can utilize the last fullyconnected layers of the trained network as the visual embeddings (e.g.,feature vectors) for the images to determine visually similar neighborsfor one or more images. For example, in one or more embodiments, thedigital content contextual tagging system 106 utilizes 17 million stockimages and an ImageNet dataset to perform multi-task training of aneural network feature representation. Indeed, the digital contentcontextual tagging system 106 can utilize a dictionary of around 100thousand tags (with highest frequency) to build a bag-of-tagrepresentation with term frequency-inverse document frequency scores.Moreover, the digital content contextual tagging system 106 can runk-means clustering on the bag-of-tag representation to obtain conceptclusters (e.g., the pseudo classes). Additionally, the digital contentcontextual tagging system 106 can utilize a ResNet-50 network to train asoftmax classification loss on all of the clusters. Indeed, the digitalcontent contextual tagging system 106 can utilize the second-to-the-lastlayer (pool5) layer of the ResNet-50 network as the Stock7 featurerepresentation (e.g., for the images).

Furthermore, the digital content contextual tagging system 106 canutilize the tag based vectors and/or the k pseudo classes to determinedistance values between a digital image (e.g., based on the bag of tagsvector for the digital image) and a pseudo class (e.g., a clustercenter). Indeed, the digital content contextual tagging system 106 canutilize one or more approaches described above to determine a distancevalue between a tag based vector of a digital image and a pseudo class.Furthermore, the digital content contextual tagging system 106 can alsoutilize the distance values to determine a digital image similarityscore for a digital image belonging to a pseudo class (e.g., a cluster)in accordance with one or more embodiments herein.

Indeed, the digital content contextual tagging system 106 can generateimage clusters for the images from the collection of images utilizingvisual features (e.g., utilizing image descriptors as described above)and/or by utilizing tag based vectors (e.g., utilizing a bag of tagsvector as describe above). In some embodiments, the digital contentcontextual tagging system 106 utilizes a combination of feature vectorsand tag based vectors to generate image cluster. Moreover, the digitalcontent contextual tagging system 106 can also utilize the featurevectors, the tag based vectors, and/or a combination of feature vectorsand tag based vectors to determine digital image similarity scores inaccordance with one or more embodiments herein.

Furthermore, upon determining a digital image similarity score for adigital image within an image cluster, the digital content contextualtagging system 106 can associate the digital image similarity score withthe digital image for the image cluster. Moreover, a digital image canbelong to more than one cluster (and be associated with a digital imagesimilarity score corresponding to each separate cluster). Additionally,the digital content contextual tagging system 106 can generate multipleclusters from the collection of digital images in accordance with one ormore embodiments to propagate multi-term contextual tags to digitalimages within the multiple clusters. Indeed, the digital contentcontextual tagging system 106 can utilize clusters that representdifferent classes and/or features.

In one or more embodiments, the digital content contextual taggingsystem 106 utilizes the Optimized Product Quantization technique toapproximate the nearest neighbors for one or more images (e.g., to formthe image clusters). In particular, the digital content contextualtagging system 106 utilizes the Optimized Product Quantization techniqueto decompose the high-dimensional vector space (e.g., corresponding tothe feature vectors) into a Cartesian product of subspaces and then toquantize these subspaces separately. Indeed, the digital contentcontextual tagging system 106 can utilize the Optimized ProductQuantization technique to compact image representation and enable fasterretrieval in the clustering phase (e.g., the K-nearest neighborclustering phase for the one or more images).

As mentioned above, the digital content contextual tagging system 106can propagate one or more multi-term contextual tags to one or moreadditional images from a collection of images. For example, FIG. 5Billustrates the digital content contextual tagging system 106propagating one or more multi-term contextual tags to one or more imagesin a cluster of images. In particular, as shown in FIG. 5B, the digitalcontent contextual tagging system 106 identifies digital images 512 thatinclude multi-term contextual tags from the image cluster 510 (e.g., theimage cluster 510 generated in FIG. 5A). Indeed, as shown in FIG. 5B,the digital content contextual tagging system 106 identifies the digitalimages 512 with multi-term contextual tag scores (e.g., the scoresassociated with the multi-term contextual tags) and/or digital imagesimilarity scores as determined in accordance with one or moreembodiments herein.

Moreover, as shown in FIG. 5B, the digital content contextual taggingsystem 106 generates aggregated multi-term contextual tag scores 516 forthe one or more multi-term contextual tags associated with the digitalimages 512 (e.g., based on factors such as the multi-term contextual tagscores and/or digital image similarity scores). Furthermore, inreference to FIG. 5B, the digital content contextual tagging system 106utilizes the aggregated multi-term contextual tag scores 516 (and/or tagcharacteristics) to determine ranking scores (in act 520) for themulti-term contextual tags. Then, as shown in FIG. 5B, the digitalcontent contextual tagging system 106 utilizes the ranking scores (fromact 520) of the multi-term contextual tags to filter and associate themulti-term contextual tags (in act 524) to the digital images of theimage cluster 510. Moreover, as illustrated in FIG. 5B, the digitalcontent contextual tagging system 106 can store the digital images withthe associated multi-term contextual tags (from act 524) in the imageindex 216 (e.g., back fill into the image collection).

In one or more embodiments, the digital content contextual taggingsystem 106 identifies one or more digital images having one or moremulti-term contextual tags from a cluster of images to propagate thosemulti-term contextual tags to additional images in the cluster. Inparticular, the digital content contextual tagging system 106 canidentify one or more digital images having one or more multi-termcontextual tags from the cluster and also identify associated scores forthe digital images. For instance, the digital content contextual taggingsystem 106 can identify multi-term contextual tag scores and/or imagesimilarity scores for the one or more digital images having the one ormore multi-term contextual tags. In some embodiments, the digitalcontent contextual tagging system 106 identifies the one or more digitalimages having the one or more multi-term contextual tags by crossreferencing a set of digital images having one or more multi-termcontextual tags determined and associated utilizing search querysupervision as described above.

Moreover, the digital content contextual tagging system 106 can generateaggregated scores for the one or more multi-term contextual tagsbelonging to the one or more digital images (e.g., the digital images512). In particular, the digital content contextual tagging system 106can generate an aggregated score for a multi-term contextual tag basedon multi-term contextual tag scores for the multi-term contextual tagacross one or more digital images that include the multi-term contextualtag. Additionally, the digital content contextual tagging system 106 canutilize one or more factors (e.g., the digital image similarity score,the multi-term contextual tag score, etc.) to weight multi-termcontextual tags scores used for an aggregated score and/or theaggregated score of a multi-term contextual tag.

Furthermore, the digital content contextual tagging system 106 cangenerate an aggregated score for a multi-term contextual tag across oneor more digital images by utilizing a variety of aggregation methods.For instance, the digital content contextual tagging system 106 can addmulti-term contextual tag scores corresponding to one or more digitalimages (e.g., across the digital images) to generate an aggregatedmulti-term contextual tag score. In one or more embodiments, the digitalcontent contextual tagging system 106 calculates a mean value for themulti-term contextual tag scores corresponding to the one or moredigital images as the aggregated multi-term contextual tag score.Additionally, in one or more embodiments, the digital content contextualtagging system 106 calculates a median, mode, and/or max from one ormore multi-term contextual tag scores corresponding to the one or moredigital images to generate an aggregated multi-term contextual tagscore. Indeed, the digital content contextual tagging system 106 canutilize a variety of statistical analyses and/or algorithms to aggregatethe one or more multi-term contextual tag scores corresponding to thedigital images.

Additionally, the digital content contextual tagging system 106 can alsoprovide weights to the individual multi-term contextual tag scores priorto aggregating the multi-term contextual tag scores. For example, aspreviously mentioned, the digital content contextual tagging system 106can provide weights to the multi-term contextual tag scorescorresponding to each digital image based on one or more factors. Forexample, the digital content contextual tagging system 106 can utilize asimilarity score (and/or distance values from clustering) that isassociated with a digital image (e.g., a similarity score based on arelation between the digital image and a cluster of images) to provide aweight to the multi-term contextual tag scores belonging to the digitalimage.

For instance, the digital content contextual tagging system 106 canamplify (or boost) a multi-term contextual tag score corresponding tothe digital image when the digital image includes a high similarityscore. Moreover, the digital content contextual tagging system 106 canalso dampen the multi-term contextual tag score corresponding to thedigital image when the digital image includes a low similarity score.Indeed, the digital content contextual tagging system 106 can determinewhen the digital image similarity score is high or low based on athreshold similarity score and/or a sliding scale. As an example,multi-term contextual tag scores for digital images having higherdigital image similarity scores can be increasingly weighted.

Furthermore, the digital content contextual tagging system 106 canprovide weights to the multi-term contextual tag scores based on acombination of factors. For instance, the digital content contextualtagging system 106 can provide a weight to a multi-term contextual tagscore (prior to generating an aggregated tag score from one or moremulti-term contextual tag scores) based on a combination of themulti-term contextual tag score and a digital image similarity scorefrom the digital image corresponding to the multi-term contextual tagscore. For instance, the digital content contextual tagging system 106can amplify and/or dampen a multi-term contextual tag score prior togenerating an aggregated score based on various combinations of themulti-term contextual tag score and a digital image similarity score.

For example, the digital content contextual tagging system 106 canamplify the multi-term contextual tag score of a digital image (e.g., byproviding a large weight) when the multi-term contextual tag score ishigh and the digital image similarity score is high. Moreover, as anexample, the digital content contextual tagging system 106 can amplifythe multi-term contextual tag score when the multi-term contextual tagscore is low and the digital image similarity score is high (e.g.,amplify to a lesser extent than when both the multi-term contextual tagscore and digital image similarity score are high). Furthermore, as anexample, the digital content contextual tagging system 106 can amplifythe multi-term contextual tag score when the multi-term contextual tagscore is high and the digital image similarity score is low (e.g.,amplify to a lesser extent than when both the multi-term contextual tagscore and digital image similarity score are high).

In addition, as an example, the digital content contextual taggingsystem 106 can also dampen the multi-term contextual tag score when themulti-term contextual tag score is high and the digital image similarityscore is low. Additionally, as an example, the digital contentcontextual tagging system 106 can provide no weight to and/or dampen themulti-term contextual tag score when both the multi-term contextual tagscore and the digital image similarity score are low. Furthermore, as anexample, the digital content contextual tagging system 106 can provide agreater weight to a multi-term contextual tag score when both themulti-term contextual tag score and the digital image similarity scoreare high compared to a weight provided when the multi-term contextualtag score is low and the digital image similarity score is high. Indeed,the digital content contextual tagging system 106 can amplify and/ordampen a multi-term contextual tag score for use in an aggregatedmulti-term contextual tag score based on various combinations of amulti-term contextual tag score and a digital image similarity score.

Additionally, the digital content contextual tagging system 106 canutilize other factors and/or combination of other factors to provide aweight to a multi-term contextual tag score for generating an aggregatedtag score. For instance, the digital content contextual tagging system106 can utilize the recency of the multi-term contextual tag (e.g., howrecently the multi-term contextual tag has been tagged to the digitalimage) as a weighing factor for generating an aggregated tag score.Moreover, the digital content contextual tagging system 106 can utilizeone or more user interactions corresponding to a digital image and/ormulti-term contextual tag, as described above (e.g., purchases, saves,feedback, etc.), as a weighing factor. Furthermore, the digital contentcontextual tagging system 106 can utilize the number of times amulti-term contextual tag is present across the one or more digitalimages (from a cluster) as a weighing factor.

In one or more embodiments, the digital content contextual taggingsystem 106 determines a weighted multi-term contextual tag score (usingone or more approaches described above) for each multi-term contextualtag score corresponding to a multi-term contextual tag from a cluster ofimages. Moreover, the digital content contextual tagging system 106utilizes the weighted multi-term contextual tag scores to generate anaggregated multi-term contextual tag score in accordance with one ormore embodiments herein. Additionally, the digital content contextualtagging system 106 can also utilize the one or more weighting factors(described above) to weight an aggregated multi-term contextual tagscore.

Moreover, the digital content contextual tagging system 106 can rank theone or more multi-term contextual tags identified from a cluster ofimages. In particular, the digital content contextual tagging system 106can determine a ranking score for the one or more multi-term contextualtags. In some embodiments, the digital content contextual tagging system106 utilizes the aggregated scores as the ranking scores (e.g., rank themulti-term contextual tags based on their corresponding aggregated tagscores).

In some embodiments, the digital content contextual tagging system 106normalizes the aggregated tag scores to generate the ranking scores. Forinstance, the digital content contextual tagging system 106 cannormalize (e.g., using a max normalization) the aggregated tag scores bymaking highest aggregated tag score equivalent to the value of 1 (as theranking score). Then, the digital content contextual tagging system 106can determine a normalized ranking score under 1 for the othermulti-term contextual tags in relation to the highest aggregated tagscore. Moreover, the digital content contextual tagging system 106 canrank the multi-term contextual tags based on the ranking scores (e.g.,rank from the highest to lowest ranking scores).

Furthermore, the digital content contextual tagging system 106 can alsoprovide weights to the one or more ranking scores for the multi-termcontextual tags (e.g., re-rank the multi-term contextual tags). Forinstance, the digital content contextual tagging system 106 can providea weight to (and/or modify) the ranking scores based on tagcharacteristics. Indeed, the digital content contextual tagging system106 can utilize tag characteristics of the one or more multi-termcontextual tags to provide more or less weight to the ranking scores(e.g., amplify or dampen) associated with the one or more rankingscores. In particular, the digital content contextual tagging system 106can utilize any number of tag characteristics and/or combination of tagcharacteristic to weight the ranking scores (or rank) of multi-termcontextual tags.

For example, the digital content contextual tagging system 106 canprovide weights to ranking scores of the one or more multi-termcontextual tags based on the sizes corresponding to the multi-termcontextual tags. In particular, in one or more embodiments, the digitalcontent contextual tagging system 106 amplifies (e.g., provides moreweight) to multi-term contextual tags when the size of a multi-termcontextual tag meets a threshold size (e.g., greater than and/or equalto the threshold size). In some embodiments, the digital contentcontextual tagging system 106 can weigh the ranking score based on asliding scale (e.g., increasingly amplifying and/or dampening theranking score as the multi-term contextual tag size increases and/ordecreases). As an example, the digital content contextual tagging system106 can multiply a ranking score for a multi-term contextual tag thatincludes six terms by a weight of 1.5 whereas the digital contentcontextual tagging system 106 can multiply a ranking score for amulti-term contextual tag that includes two terms by a weight of 1.1.

As another example, the digital content contextual tagging system 106can provide a weight to a ranking score of a multi-term contextual tagbased on the complexity and/or specificity of the multi-term contextualtag. In particular, the digital content contextual tagging system 106can analyze a multi-term contextual tag to determine the complexityand/or specificity of the multi-term contextual tag. For instance, thedigital content contextual tagging system 106 can identify thevocabulary utilized in the multi-term contextual tag to determine thecomplexity and/or specificity of the multi-term contextual tag.Furthermore, the digital content contextual tagging system 106 canprovide a weight to the ranking score, by amplifying and/or dampeningthe ranking score, of the multi-term contextual tag based on thedetermined complexity and/or specificity of the multi-term contextualtag.

Additionally, as previously mentioned, the digital content contextualtagging system 106 can filter (and/or prune) multi-term contextual tagsand associate the filtered multi-term contextual tags with one or moredigital images of an image cluster. For instance, the digital contentcontextual tagging system 106 can utilize ranking scores (as determinedabove) of one or more multi-term contextual tags to filter themulti-term contextual tags to create a final set of multi-termcontextual tags. Indeed, the digital content contextual tagging system106 can filter a threshold number of tags from the one or moremulti-term contextual tags based on their ranking scores. In particular,the digital content contextual tagging system 106 can select a thresholdnumber of multi-term contextual tags by selecting the threshold numberof the highest ranked multi-term contextual tags (from a set of rankedmulti-term contextual tags) based on corresponding ranking scores. As anexample, in reference to FIG. 5B, the digital content contextual taggingsystem 106 can utilize the two highest ranked multi-term contextual tags(of act 520) as the final set of multi-term contextual tags (of act 524)for the images in the image cluster 510.

In one or more embodiments, the digital content contextual taggingsystem 106 utilizes a threshold ranking score to filter multi-termcontextual tags. For instance, the digital content contextual taggingsystem 106 can identify multi-term contextual tags that correspond toranking scores that meet the threshold ranking score (e.g., are greaterthan or equal to the threshold ranking score). Moreover, the digitalcontent contextual tagging system 106 can utilize the identifiedmulti-term contextual tags (e.g., based on the threshold ranking score)as the final set of multi-term contextual tags for the digital images inan image cluster. For instance, the digital content contextual taggingsystem 106 can determine a threshold ranking score based various factorssuch as the size of an image cluster, the number of multi-termcontextual tags present in an image cluster, user input, etc.

Furthermore, as previously mentioned, the digital content contextualtagging system 106 can associate the filtered multi-term contextual tagswith one or more digital images from an image cluster (e.g., propagatethe multi-term contextual tags to the digital images). In particular,the digital content contextual tagging system 106 can associate afiltered, final set of multi-term contextual tags (as determined inaccordance with one or more embodiments herein) to digital imagesbelonging to an image cluster (i.e., the additional one or more images).In some embodiments, the digital content contextual tagging system 106associates the final set of multi-term contextual tags to each digitalimage of an image cluster. Furthermore, the digital content contextualtagging system 106 can associate the final set of multi-term contextualtags to the digital images as additional tags (e.g., the digital imagescan have pre-existing tags and/or multi-term contextual tags and newlypropagated multi-term contextual tags).

Additionally, the digital content contextual tagging system 106 can alsoassociate (and/or tag) multi-term contextual tag scores (belonging tothe multi-term contextual tags from the final set of multi-termcontextual tags) with the one or more digital images from the imagecluster. For example, the digital content contextual tagging system 106can utilize the aggregated tag score corresponding to the multi-termcontextual tag as the multi-term contextual tag score for the digitalimages from the image cluster. In one or more embodiments, the digitalcontent contextual tagging system 106 can associate a multi-termcontextual tags from a filtered, final set of multi-term contextual tagswith digital images of an image cluster with a new multi-term contextualtag score that can be updated (in accordance with one or moreembodiments herein) based on future search queries and/or userinteractions.

Moreover, upon associating the filtered, final set of multi-termcontextual tags with digital images from an image cluster, the digitalcontent contextual tagging system 106 can update a collection of images(e.g., the image index 216) to include the digital images tagged withthe multi-term contextual tags from the final set of multi-termcontextual tags. Furthermore, the digital content contextual taggingsystem 106 can also include associated multi-term contextual tag scoresfor the one or more multi-term contextual tags corresponding to thedigital images (from the image cluster) in an image index. Moreover, thedigital content contextual tagging system 106 can utilize the digitalimages corresponding to the propagated multi-term contextual tags, afterproviding the digital images with updated multi-term contextual tags toan image index, to propagate multi-term contextual tags to additionalimages within the image index in accordance with one or more embodimentsherein.

Additionally, the digital content contextual tagging system 106 canpropagate any number of tags to any number of digital images inaccordance with one or more embodiments herein. Furthermore, the digitalcontent contextual tagging system 106 can also determine any number ofimage clusters to propagate one or more multi-term contextual tags toadditional images in accordance with one or more embodiments herein.Moreover, a digital image can belong to more than one image cluster. Inaddition, the digital content contextual tagging system 106 canpropagate more than one multi-term contextual tags due to the digitalimage being present in more than one image cluster in accordance withone or more embodiments herein. Moreover, the digital content contextualtagging system 106 can determine, associate, and/or propagate otherinformation related to digital content (e.g., metadata) in accordancewith one or more embodiments herein. In some embodiments, the digitalcontent contextual tagging system 106 can iteratively propagatemulti-term contextual tags to digital images (e.g., by determiningvisually similar images, ranking multi-term contextual tags associatedwith those similar images, and filtering a final set of multi-termcontextual tags for the similar images in accordance with one or moreembodiments herein after an initial propagation of multi-term contextualtags).

As mentioned above, the digital content contextual tagging system 106can provide images that correspond to multi-term contextual tags assearch results. For instance, as shown in FIG. 6, the digital contentcontextual tagging system 106 can receive a search query 602 (e.g.,“person with animal on white shirt”). Moreover, the digital contentcontextual tagging system 106 can utilize search engine 604 to determineone or more multi-term contextual tags that match with the search query602 (e.g., based on search query n-grams). Furthermore, the digitalcontent contextual tagging system 106 can utilize the search engine 604to identify digital images from the image index 216 that include one ormore multi-term contextual tags match the one or more determinedmulti-term contextual tags based from the search query 602.

Furthermore, as shown in FIG. 6, the digital content contextual taggingsystem 106 can rank the identified images (from the image index 216) inact 608. For instance, as illustrated in FIG. 6, the digital contentcontextual tagging system 106 can rank the identified images based onmulti-term contextual tag scores associated with one or more multi-termcontextual tags that correspond to the search query 602. Indeed, asshown in FIG. 6, upon ranking the identified images in act 608, thedigital content contextual tagging system 106 can provide the identifiedimages in act 610 as search results (e.g., images portraying personswearing animal shirts based on a correspondence to a multi-termcontextual tag of “person with animal on white shirt”). Indeed, asillustrated in FIG. 6, the digital content contextual tagging system 106can utilize propagated multi-term contextual tags to provide moreaccurate search results in response to search queries by client devices.

In one or more embodiments, the digital content contextual taggingsystem 106 determines one or more possible multi-term contextual tagsfor a search query received from a client device. In particular, thedigital content contextual tagging system 106 can utilize one or moren-grams of the search query as possible multi-term contextual tags inaccordance with one or more embodiments herein. Furthermore, the digitalcontent contextual tagging system 106 can match the one or more n-gramsgenerated from the search query with multi-term contextual tags in animage index to identify one or more multi-term contextual tags thatexist in the image index (e.g., a collection of images). Indeed, the oneor more possible multi-term contextual tags may include tags that matchand/or are relevant to the multi-term contextual tags in the imageindex. Then, the digital content contextual tagging system 106 canidentify digital images from an image index that include the one or moredetermined possible multi-term contextual tags.

Furthermore, the digital content contextual tagging system 106 can rankthe one or more identified images (e.g., the images having one or moremulti-term contextual tags that match a search query). In particular,the digital content contextual tagging system 106 can rank the one ormore identified images to determine which images to surface as searchresults and/or in which order to surface the images as search results.For instance, the digital content contextual tagging system 106 canutilize multi-term contextual tag scores associated with the multi-termcontextual tags and digital images (in accordance with one or moreembodiments herein) to rank the digital images in a search result.Moreover, the digital content contextual tagging system 106 can alsoutilize multi-term contextual tag characteristics (in accordance withone or more embodiments) to rank the digital images as search results.Then, the digital content contextual tagging system 106 can surface thedigital images (and/or some of the digital images) based on the searchranking in response to the search query. Moreover, the digital contentcontextual tagging system 106 can also order the digital images based onthe determined search rankings of the one or more digital images thatinclude multi-term contextual tags corresponding to the search query.

As previously mentioned, by determining and associating multi-termcontextual tags for digital images utilizing search query supervisionand propagating the multi-term contextual tags to additional imagesusing similarities between the digital images and the additional images,the digital content contextual tagging system 106 can more accuratelytag and/or retrieve digital images in response to search queries. Forinstance, an image and a set of multi-term contextual that wereassociated to the image in accordance with one or more embodimentsherein were utilized to generate image-multi-term contextual tag pairs(for approximately 5000 images from Adobe Stock). These pairs were shownto human annotators without maintaining the generated order of themulti-term contextual tags (e.g., the rankings in accordance with one ormore embodiments herein) to rate the image-multi-term contextual tagpairs from 0 to 3 (e.g., 0 being not learned and three being excellentlylearned). Furthermore, the normalized discounted cumulative gain(“NDCG”) was calculated to test if the digital content contextualtagging system 106 ranks the better multi-term contextual tags higherfor an image compared to the human annotators. Indeed, the digitalcontent contextual tagging system 106 resulted with the following NDCGscores: ndcg@1: 0.723990, ndcg@2: 0.760361, ndcg@3: 0.780140, ndcg@4:0.793022, ndcg@5: 0.801294, ndcg@6: 0.808312, ndcg@7: 0.813943, ndcg@8:0.818855, ndcg@9: 0.822834, and ndcg@10: 0.826580.

Moreover, a search ranking pairwise accuracy was calculated for searchqueries based on multi-term contextual tags associated with digitalimages in accordance with one or more embodiments herein. In particular,given a search query session, user purchase impressions were tracked fortwo images (where both images were in the search query results). Theimages were tracked to see how often the purchased image has a highermulti-term contextual tag score (that related to the search query) thanthe image that was not purchased to determine an aggregate pairwiseaccuracy for the correlation of multi-term contextual tags and purchasedata trends. Indeed, the experiment resulted in a 55.5% accuracy (e.g.,a positive correlation) between the multi-term contextual tags that werepropagated to images and purchase data trends. Furthermore, theexperiment resulted in a 58.3% accuracy (e.g., a positive correlation)between original multi-term contextual tags of images and purchase datatrends. Therefore, a positive correlation (e.g., useful as a ranking andsearch query feature) between search queries utilizing multi-termcontextual tags (determined and propagated in accordance with one ormore embodiments herein) and purchase data were established.

Additionally, ranker tests utilizing the multi-term contextual tags as afeature in the current Adobe Stock ranker model were also performedusing purchase data as a signal. Indeed, utilizing multi-term contextualtags (determined and/or propagated in accordance with one or moreembodiments herein) resulted in an improvement to the baseline numbersof the current ranker model of Adobe Stock.

Turning now to FIG. 7, additional detail will be provided regardingcomponents and capabilities of one embodiment of the digital contentcontextual tagging system. In particular, FIG. 7 illustrates anembodiment of an example digital content contextual tagging system 106executed by a computing device 700 (e.g., the server device(s) 102and/or the client device 110). As shown by the embodiment in FIG. 7, thecomputing device 700 can include or host the digital visual media system104 and the digital content contextual tagging system 106. The digitalcontent contextual tagging system 106 can include a multi-termcontextual tag generator 702, a clustering manager 704, an aggregatedtag score generator 706, a multi-term contextual tag propagation manager708, a search engine manager 710, and a storage manager 712 which caninclude digital content data 714, cluster data 716, and tag data 718.

As just mentioned, and as illustrated in the embodiment in FIG. 7, thedigital content contextual tagging system 106 can include the multi-termcontextual tag generator 702. For instance, the multi-term contextualtag generator 702 can receive search queries, determine multi-termcontextual tags from search queries, detect user selections of digitalimage search results, match digital image tags with terms of adetermined multi-term contextual tag, associate multi-term contextualtags with selected digital images from search result, and/or determinemulti-term contextual tag scores as described above (e.g., in relationto FIGS. 2 and 4).

Furthermore, as shown in FIG. 7, the digital content contextual taggingsystem 106 can include the clustering manager 704. For example, theclustering manager 704 can generate image descriptors for images,cluster images using the image descriptors, and/or generator similarityscores for digital images within a cluster as described above (e.g., inrelation to FIGS. 3 and 5A). Additionally, the clustering manager 704can utilize a neural network and a clustering technique such as ak-nearest neighbor algorithm to generate a cluster of images.

In addition, as shown in FIG. 7, the digital content contextual taggingsystem 106 can include the aggregated tag score generator 706. Forinstance, the aggregated tag score generator 706 can identify one ormore digital images having multi-term contextual tags, generateaggregated multi-term contextual tag score for multi-term contextualtags across the one or more digital images, and provide weights to theaggregated multi-term contextual tag scores as described above (e.g., inrelation to FIGS. 3 and 5B).

Moreover, as shown in FIG. 7, the digital content contextual taggingsystem 106 can include the multi-term contextual tag propagation manager708. For example, the multi-term contextual tag propagation manager 708can rank multi-term contextual tags based on aggregated multi-termcontextual tag scores, filter multi-term contextual tags based on ranksto generate a final set of multi-term contextual tags, and/or associatethe final set of multi-term contextual tags to digital images belongingto a cluster of images from which the multi-term contextual tags wereidentified as described above (e.g., in relation to FIGS. 3 and 5B).

Furthermore, as shown in FIG. 7, the digital content contextual taggingsystem 106 can include the search engine manager 710. For example, thesearch engine manager 710 can receive a search query, determinemulti-term contextual tags relevant for the search query, identifydigital images from an image index corresponding to the determinedmulti-term contextual tags, rank the identified digital images based onmulti-term contextual tag scores, and/or provide the ranked digitalimages as search results as described above (e.g., in relation to FIGS.3 and 6).

Furthermore, as illustrated in FIG. 7, the digital content contextualtagging system 106 can include the storage manager 712. The storagemanager 712 can maintain data to perform the one or more functions ofthe digital content contextual tagging system 106. As illustrated, thestorage manager 712 can include digital content data 714 (e.g., digitalimages), cluster data 716 (e.g., neural network component data,clustering component data, and/or similarity score data), and tag data718 (e.g., digital image tags, multi-term contextual tags, multi-termcontextual tag scores, and/or aggregated multi-term contextual tagscores).

Each of the components 702-718 of the computing device 700 (e.g., thecomputing device 700 implementing the digital content contextual taggingsystem 106), as shown in FIG. 7, may be in communication with oneanother using any suitable communication technologies. It will berecognized that although components 702-718 of the computing device 700are shown to be separate in FIG. 7, any of components 702-718 may becombined into fewer components, such as into a single facility ormodule, divided into more components, or configured into differentcomponents as may serve a particular embodiment.

The components 702-718 of the computing device 700 can comprisesoftware, hardware, or both. For example, the components 702-718 cancomprise one or more instructions stored on a computer-readable storagemedium and executable by processors of one or more computing devices.When executed by the one or more processors, the computer-executableinstructions of the digital content contextual tagging system 106 (e.g.,via the computing device 700) can cause a client device and/or a serverdevice to perform the methods described herein. Alternatively, thecomponents 702-718 and their corresponding elements can comprisehardware, such as a special purpose processing device to perform acertain function or group of functions. Additionally, the components702-718 can comprise a combination of computer-executable instructionsand hardware.

Furthermore, the components 702-718 of the digital content contextualtagging system 106 may, for example, be implemented as one or moreoperating systems, as one or more stand-alone applications, as one ormore modules of an application, as one or more plug-ins, as one or morelibrary functions or functions that may be called by other applications,and/or as a cloud-computing model. Thus, the components 702-718 may beimplemented as a stand-alone application, such as a desktop or mobileapplication. Furthermore, the components 702-718 may be implemented asone or more web-based applications hosted on a remote server. Thecomponents 702-718 may also be implemented in a suite of mobile deviceapplications or “apps.” To illustrate, the components 702-718 may beimplemented in an application, including but not limited to, ADOBE®DOCUMENT CLOUD, ADOBE® CAPTIVATE® PRIME, ADOBE® ANALYTICS CLOUD, ADOBE®ANALYTICS, ADOBE® AUDIENCE MANAGER, ADOBE® CAMPAIGN, ADOBE® EXPERIENCEMANAGER, and ADOBE® TARGET. “ADOBE,” “ADOBE® DOCUMENT CLOUD,” “ADOBECAPTIVATE PRIME,” “ADOBE ANALYTICS CLOUD,” “ADOBE ANALYTICS,” “ADOBEAUDIENCE MANAGER,” “ADOBE CAMPAIGN,” “ADOBE EXPERIENCE MANAGER,” and“ADOBE TARGET” are either registered trademarks or trademarks of AdobeInc. in the United States and/or other countries.

FIGS. 1-7, the corresponding text, and the examples provide a number ofdifferent methods, systems, devices, and non-transitorycomputer-readable media of the digital content contextual tagging system106. In addition to the foregoing, one or more embodiments can also bedescribed in terms of flowcharts comprising acts for accomplishing aparticular result, as shown in FIG. 8. FIG. 8 may be performed with moreor fewer acts. Further, the acts may be performed in differing orders.Additionally, the acts described herein may be repeated or performed inparallel with one another or parallel with different instances of thesame or similar acts.

As mentioned above, FIG. 8 illustrates a flowchart of a series of acts800 for determining multi-term contextual tags for digital content andpropagating the multi-term contextual tags to additional digital contentin accordance with one or more embodiments. While FIG. 8 illustratesacts according to one embodiment, alternative embodiments may omit, addto, reorder, and/or modify any of the acts shown in FIG. 8. The acts ofFIG. 8 can be performed as part of a method. Alternatively, anon-transitory computer-readable medium can comprise instructions that,when executed by one or more processors, cause a computing device toperform the acts of FIG. 8. In some embodiments, a system can performthe acts of FIG. 8.

As illustrated in FIG. 8, the series of acts 800 includes an act 802 ofdetermining and associating one or more multi-term contextual tags withone or more digital content items. In particular, the act 802 caninclude determining and associating one or more multi-term contextualtags with one or more digital content items based on a correspondencebetween user search queries, tags of the one or more digital contentitems, and user selections of the one or more digital content items inresponse to the user search queries. Furthermore, the multi-termcontextual tag can include a plurality of terms that represent a conceptbased on a relation between the plurality of terms. Furthermore, the act802 can include determining one or more multi-term contextual tags fromuser search queries. Moreover, the act 802 can include generating tagscores based on user selection frequencies of one or more digitalcontent items associated with one or more multi-term contextual tags inresponse to user search queries.

Additionally, the act 802 can include associating one or more multi-termcontextual tags with one or more digital content items based on userselections of the one or more digital content items in response to usersearch queries and one or more terms of the one or more multi-termcontextual tags including the tags of the one or more digital contentitems. Furthermore, the act 802 can include associating one or moremulti-term contextual tags with one or more digital content items andgenerating tag scores for the one or more digital content items based onuser selections of the one or more digital content items in response touser search queries and one or more terms of the one or more multi-termcontextual tags including tags of the one or more digital content items.

In addition to (or in the alternative to) the acts above, the series ofacts 800 can also include a step for determining and associating one ormore multi-term contextual tags with one or more digital content itemsfrom user search queries. For example, the acts and algorithms describedabove in relation to FIG. 2 (e.g., the acts 202-216) and FIG. 4 (e.g.,the acts 402-414) can comprise the corresponding acts and algorithms(i.e., structures) for performing a step for determining and associatingone or more multi-term contextual tags with one or more digital contentitems from user search queries.

As illustrated in FIG. 8, the series of acts 800 also includes an act804 of propagating one or more multi-term contextual tags to one or moreadditional digital content items. In particular, the act 804 can includepropagating one or more multi-term contextual tags to one or moreadditional digital content items based on a similarity between one ormore additional digital content items and one or more digital contentitems associated with the one or more multi-term contextual tags.Additionally, the act 804 can include identifying one or more additionaldigital content items based on similarities with one or more digitalcontent items associated with one or more multi-term contextual tags.Moreover, the act 804 can include propagating one or more multi-termcontextual tags to one or more additional digital content items based ona combination of the tag scores and digital content item similarityscores.

Furthermore, the act 804 can include generating, utilizing a neuralnetwork, one or more descriptors for a collection of digital contentitems. Moreover, the act 804 can include generating a cluster of digitalcontent items from the collection of digital content items using aclustering algorithm and one or more descriptors. For example, thecluster of digital content items can include one or more digital contentitems associated with one or more multi-term contextual tags.Additionally, the act 804 can include identifying one or more additionaldigital content items from a cluster of digital content items.

Furthermore, the act 804 can include identifying a set of multi-termcontextual tags from digital content items of a cluster of digitalcontent items. Moreover, the act 804 can include determining digitalcontent item similarity scores (for one or more digital content items)based on distance values associated with digital content items ofcluster of digital content items. For instance, the clustering algorithmcan include a k-nearest neighbor algorithm.

Additionally, the act 804 can include generating a set of aggregatedscores for a set of multi-term contextual tags based on a combination oftag scores and digital content item similarity scores. Furthermore, theact 804 can include propagating one or more multi-term contextual tagsto one or more additional digital content items by associating the setof multi-term contextual tags with digital content items of a cluster ofdigital content items based on a set of aggregated scores.

Moreover, the act 804 can include determining a final set of multi-termcontextual tags based on a set of aggregated scores and tagcharacteristics of multi-term contextual tags from a set of multi-termcontextual tags. Additionally, the act 804 can include determiningranking scores for a set of multi-term contextual tags based on a set ofaggregated scores and tag characteristics of multi-term contextual tagsfrom the set of multi-term contextual tags. For example, the tagcharacteristics of the multi-term contextual tags can include tag sizesfor multi-term contextual tags from a set of multi-term contextual tags.Moreover, the act 804 can include determining a final set of multi-termcontextual tags by identifying ranking scores that satisfy a thresholdranking score. Furthermore, the act 804 can include propagating one ormore multi-term contextual tags to one or more additional digitalcontent items by associating a final set of multi-term contextual tagswith digital content items of a cluster of digital content items.

In addition to (or in the alternative to) the acts above, the series ofacts 800 can also include a step for propagating the one or moremulti-term contextual tags to one or more additional digital contentitems. For example, the acts and algorithms described above in relationto FIG. 3 (e.g., the acts 302-318) and FIGS. 5A-5B (e.g., the acts504-520) can comprise the corresponding acts and algorithms (i.e.,structures) for performing a step for propagating the one or moremulti-term contextual tags to one or more additional digital contentitems.

As illustrated in FIG. 8, the series of acts 800 also includes an act806 of returning a digital content item associated with a multi-termcontextual tag. In particular, the act 806 can include receiving anadditional search query comprising a multi-term contextual tag and/orreturning a digital content item associated with the multi-termcontextual tag.

Embodiments of the present disclosure may comprise or utilize a specialpurpose or general-purpose computer including computer hardware, suchas, for example, one or more processors and system memory, as discussedin greater detail below. Embodiments within the scope of the presentdisclosure also include physical and other computer-readable media forcarrying or storing computer-executable instructions and/or datastructures. In particular, one or more of the processes described hereinmay be implemented at least in part as instructions embodied in anon-transitory computer-readable medium and executable by one or morecomputing devices (e.g., any of the media content access devicesdescribed herein). In general, a processor (e.g., a microprocessor)receives instructions, from a non-transitory computer-readable medium,(e.g., memory), and executes those instructions, thereby performing oneor more processes, including one or more of the processes describedherein.

Computer-readable media can be any available media that can be accessedby a general purpose or special purpose computer system.Computer-readable media that store computer-executable instructions arenon-transitory computer-readable storage media (devices).Computer-readable media that carry computer-executable instructions aretransmission media. Thus, by way of example, and not limitation,embodiments of the disclosure can comprise at least two distinctlydifferent kinds of computer-readable media: non-transitorycomputer-readable storage media (devices) and transmission media.

Non-transitory computer-readable storage media (devices) includes RAM,ROM, EEPROM, CD-ROM, solid state drives (“SSDs”) (e.g., based on RAM),Flash memory, phase-change memory (“PCM”), other types of memory, otheroptical disk storage, magnetic disk storage or other magnetic storagedevices, or any other medium which can be used to store desired programcode means in the form of computer-executable instructions or datastructures and which can be accessed by a general purpose or specialpurpose computer.

A “network” is defined as one or more data links that enable thetransport of electronic data between computer systems and/or modulesand/or other electronic devices. When information is transferred orprovided over a network or another communications connection (eitherhardwired, wireless, or a combination of hardwired or wireless) to acomputer, the computer properly views the connection as a transmissionmedium. Transmissions media can include a network and/or data linkswhich can be used to carry desired program code means in the form ofcomputer-executable instructions or data structures and which can beaccessed by a general purpose or special purpose computer. Combinationsof the above should also be included within the scope ofcomputer-readable media.

Further, upon reaching various computer system components, program codemeans in the form of computer-executable instructions or data structurescan be transferred automatically from transmission media tonon-transitory computer-readable storage media (devices) (or viceversa). For example, computer-executable instructions or data structuresreceived over a network or data link can be buffered in RAM within anetwork interface module (e.g., a “NIC”), and then eventuallytransferred to computer system RAM and/or to less volatile computerstorage media (devices) at a computer system. Thus, it should beunderstood that non-transitory computer-readable storage media (devices)can be included in computer system components that also (or evenprimarily) utilize transmission media.

Computer-executable instructions comprise, for example, instructions anddata which, when executed by a processor, cause a general-purposecomputer, special purpose computer, or special purpose processing deviceto perform a certain function or group of functions. In someembodiments, computer-executable instructions are executed by ageneral-purpose computer to turn the general-purpose computer into aspecial purpose computer implementing elements of the disclosure. Thecomputer-executable instructions may be, for example, binaries,intermediate format instructions such as assembly language, or evensource code. Although the subject matter has been described in languagespecific to structural features and/or methodological acts, it is to beunderstood that the subject matter defined in the appended claims is notnecessarily limited to the described features or acts described above.Rather, the described features and acts are disclosed as example formsof implementing the claims.

Those skilled in the art will appreciate that the disclosure may bepracticed in network computing environments with many types of computersystem configurations, including, personal computers, desktop computers,laptop computers, message processors, hand-held devices, multi-processorsystems, microprocessor-based or programmable consumer electronics,network PCs, minicomputers, mainframe computers, mobile telephones,PDAs, tablets, pagers, routers, switches, and the like. The disclosuremay also be practiced in distributed system environments where local andremote computer systems, which are linked (either by hardwired datalinks, wireless data links, or by a combination of hardwired andwireless data links) through a network, both perform tasks. In adistributed system environment, program modules may be located in bothlocal and remote memory storage devices.

Embodiments of the present disclosure can also be implemented in cloudcomputing environments. As used herein, the term “cloud computing”refers to a model for enabling on-demand network access to a shared poolof configurable computing resources. For example, cloud computing can beemployed in the marketplace to offer ubiquitous and convenient on-demandaccess to the shared pool of configurable computing resources. Theshared pool of configurable computing resources can be rapidlyprovisioned via virtualization and released with low management effortor service provider interaction, and then scaled accordingly.

A cloud-computing model can be composed of various characteristics suchas, for example, on-demand self-service, broad network access, resourcepooling, rapid elasticity, measured service, and so forth. Acloud-computing model can also expose various service models, such as,for example, Software as a Service (“SaaS”), Platform as a Service(“PaaS”), and Infrastructure as a Service (“IaaS”). A cloud-computingmodel can also be deployed using different deployment models such asprivate cloud, community cloud, public cloud, hybrid cloud, and soforth. In addition, as used herein, the term “cloud-computingenvironment” refers to an environment in which cloud computing isemployed.

FIG. 9 illustrates a block diagram of an example computing device 900that may be configured to perform one or more of the processes describedabove. One will appreciate that one or more computing devices, such asthe computing device 900 may represent the computing devices describedabove (e.g., computing device 700, server device(s) 102, and clientdevice 110). In one or more embodiments, the computing device 900 may bea mobile device (e.g., a mobile telephone, a smartphone, a PDA, atablet, a laptop, a camera, a tracker, a watch, a wearable device,etc.). In some embodiments, the computing device 900 may be a non-mobiledevice (e.g., a desktop computer or another type of client device).Further, the computing device 900 may be a server device that includescloud-based processing and storage capabilities.

As shown in FIG. 9, the computing device 900 can include one or moreprocessor(s) 902, memory 904, a storage device 906, input/outputinterfaces 908 (or “I/O interfaces 908”), and a communication interface910, which may be communicatively coupled by way of a communicationinfrastructure (e.g., bus 912). While the computing device 900 is shownin FIG. 9, the components illustrated in FIG. 9 are not intended to belimiting. Additional or alternative components may be used in otherembodiments. Furthermore, in certain embodiments, the computing device900 includes fewer components than those shown in FIG. 9. Components ofthe computing device 900 shown in FIG. 9 will now be described inadditional detail.

In particular embodiments, the processor(s) 902 includes hardware forexecuting instructions, such as those making up a computer program. Asan example, and not by way of limitation, to execute instructions, theprocessor(s) 902 may retrieve (or fetch) the instructions from aninternal register, an internal cache, memory 904, or a storage device906 and decode and execute them.

The computing device 900 includes memory 904, which is coupled to theprocessor(s) 902. The memory 904 may be used for storing data, metadata,and programs for execution by the processor(s). The memory 904 mayinclude one or more of volatile and non-volatile memories, such asRandom-Access Memory (“RAM”), Read-Only Memory (“ROM”), a solid-statedisk (“SSD”), Flash, Phase Change Memory (“PCM”), or other types of datastorage. The memory 904 may be internal or distributed memory.

The computing device 900 includes a storage device 906 includes storagefor storing data or instructions. As an example, and not by way oflimitation, the storage device 906 can include a non-transitory storagemedium described above. The storage device 906 may include a hard diskdrive (HDD), flash memory, a Universal Serial Bus (USB) drive or acombination these or other storage devices.

As shown, the computing device 900 includes one or more I/O interfaces908, which are provided to allow a user to provide input to (such asuser strokes), receive output from, and otherwise transfer data to andfrom the computing device 900. These I/O interfaces 908 may include amouse, keypad or a keyboard, a touch screen, camera, optical scanner,network interface, modem, other known I/O devices or a combination ofsuch I/O interfaces 908. The touch screen may be activated with a stylusor a finger.

The I/O interfaces 908 may include one or more devices for presentingoutput to a user, including, but not limited to, a graphics engine, adisplay (e.g., a display screen), one or more output drivers (e.g.,display drivers), one or more audio speakers, and one or more audiodrivers. In certain embodiments, I/O interfaces 908 are configured toprovide graphical data to a display for presentation to a user. Thegraphical data may be representative of one or more graphical userinterfaces and/or any other graphical content as may serve a particularimplementation.

The computing device 900 can further include a communication interface910. The communication interface 910 can include hardware, software, orboth. The communication interface 910 provides one or more interfacesfor communication (such as, for example, packet-based communication)between the computing device and one or more other computing devices orone or more networks. As an example, and not by way of limitation,communication interface 910 may include a network interface controller(NIC) or network adapter for communicating with an Ethernet or otherwire-based network or a wireless NIC (WNIC) or wireless adapter forcommunicating with a wireless network, such as a WI-FI. The computingdevice 900 can further include a bus 912. The bus 912 can includehardware, software, or both that connects components of computing device900 to each other.

In the foregoing specification, the invention has been described withreference to specific example embodiments thereof. Various embodimentsand aspects of the invention(s) are described with reference to detailsdiscussed herein, and the accompanying drawings illustrate the variousembodiments. The description above and drawings are illustrative of theinvention and are not to be construed as limiting the invention.Numerous specific details are described to provide a thoroughunderstanding of various embodiments of the present invention.

The present invention may be embodied in other specific forms withoutdeparting from its spirit or essential characteristics. The describedembodiments are to be considered in all respects only as illustrativeand not restrictive. For example, the methods described herein may beperformed with less or more steps/acts or the steps/acts may beperformed in differing orders. Additionally, the steps/acts describedherein may be repeated or performed in parallel to one another or inparallel to different instances of the same or similar steps/acts. Thescope of the invention is, therefore, indicated by the appended claimsrather than by the foregoing description. All changes that come withinthe meaning and range of equivalency of the claims are to be embracedwithin their scope.

What is claimed is:
 1. A non-transitory computer-readable medium storinginstructions that, when executed by at least one processor, cause acomputer device to: determine and associate one or more multi-termcontextual tags with one or more digital content items based on acorrespondence between user search queries, tags of the one or moredigital content items, and user selections of the one or more digitalcontent items in response to the user search queries; propagate the oneor more multi-term contextual tags to one or more additional digitalcontent items based on a similarity between the one or more additionaldigital content items and the one or more digital content itemsassociated with the one or more multi-term contextual tags; and receivean additional search query comprising a multi-term contextual tag; andreturn a digital content item associated with the multi-term contextualtag.
 2. The non-transitory computer-readable medium of claim 1, whereineach multi-term contextual tag, from the one or more multi-termcontextual tags, comprises a plurality of terms that represent a conceptbased on a relation between the plurality of terms.
 3. Thenon-transitory computer-readable medium of claim 1, wherein determiningand associating the one or more multi-term contextual tags with the oneor more digital content items comprises: determining the one or moremulti-term contextual tags from the user search queries; and associatingthe one or more multi-term contextual tags with the one or more digitalcontent items based on: the user selections of the one or more digitalcontent items in response to the user search queries; and one or moreterms of the one or more multi-term contextual tags comprising the tagsof the one or more digital content items.
 4. The non-transitorycomputer-readable medium of claim 1, further comprising instructionsthat, when executed by the at least one processor, cause the computingdevice to: generate, utilizing a neural network, one or more descriptorsfor a collection of digital content items; generate a cluster of digitalcontent items from the collection of digital content items using aclustering algorithm and the one or more descriptors, wherein thecluster of digital content items comprises the one or more digitalcontent items associated with the one or more multi-term contextualtags; and identify the one or more additional digital content items fromthe cluster of digital content items.
 5. The non-transitorycomputer-readable medium of claim 4, further comprising instructionsthat, when executed by the at least one processor, cause the computingdevice to: identify a set of multi-term contextual tags from digitalcontent items of the cluster of digital content items; generate tagscores based on user selection frequencies of the one or more digitalcontent items associated with the one or more multi-term contextual tagsin response to the user search queries; and determine digital contentitem similarity scores for the one or more digital content items basedon distance values associated with the digital content items of thecluster of digital content items.
 6. The non-transitorycomputer-readable medium of claim 5, further comprising instructionsthat, when executed by the at least one processor, cause the computerdevice to: generate a set of aggregated scores for the set of multi-termcontextual tags based on a combination of the tag scores and the digitalcontent item similarity scores; and wherein propagating the one or moremulti-term contextual tags to the one or more additional digital contentitems comprises associating the set of multi-term contextual tags withthe digital content items of the cluster of digital content items basedon the set of aggregated scores.
 7. The non-transitory computer-readablemedium of claim 4, wherein the clustering algorithm comprises ak-nearest neighbor algorithm.
 8. The non-transitory computer-readablemedium of claim 6, further comprising instructions that, when executedby the at least one processor, cause the computer device to: determine afinal set of multi-term contextual tags based on the set of aggregatedscores and tag characteristics of multi-term contextual tags from theset of multi-term contextual tags; and wherein propagating the one ormore multi-term contextual tags to the one or more additional digitalcontent items comprises associating the final set of multi-termcontextual tags with the digital content items of the cluster of digitalcontent items.
 9. The non-transitory computer-readable medium of claim8, wherein determining the final set of multi-term contextual tagscomprises: determining ranking scores for the set of multi-termcontextual tags based on the set of aggregated scores and the tagcharacteristics of the multi-term contextual tags from the set ofmulti-term contextual tags, wherein the tag characteristics comprise tagsizes for the multi-term contextual tags from the set of multi-termcontextual tags; and wherein determining the final set of multi-termcontextual tags comprises identifying the ranking scores that satisfy athreshold ranking score.
 10. A system comprising: at least oneprocessor; and at least one non-transitory computer-readable storagemedium storing instructions that, when executed by the at least oneprocessor, cause the system to: determine one or more multi-termcontextual tags from user search queries; and associate the one or moremulti-term contextual tags with one or more digital content items andgenerate tag scores for the one or more digital content items based on:user selections of the one or more digital content items in response tothe user search queries; and one or more terms of the one or moremulti-term contextual tags comprising tags of the one or more digitalcontent items; identify one or more additional digital content itemsbased on similarities with the one or more digital content itemsassociated with the one or more multi-term contextual tags; andpropagate the one or more multi-term contextual tags to the one or moreadditional digital content items based on a combination of the tagscores and digital content item similarity scores.
 11. The system ofclaim 10, wherein each multi-term contextual tag, from the one or moremulti-term contextual tags, comprises a plurality of terms thatrepresent a concept based on a relation between the plurality of terms.12. The system of claim 10, further comprising instructions that, whenexecuted by the at least one processor, cause the system to: generate,utilizing a neural network, one or more descriptors for a collection ofdigital content items; generate a cluster of digital content items fromthe collection of digital content items using a clustering algorithm andthe one or more descriptors, wherein the cluster of digital contentitems comprises the one or more digital content items associated withthe one or more multi-term contextual tags; and wherein identifying theone or more additional digital content items comprises identifying theone or more additional digital content items from the cluster of digitalcontent items.
 13. The system of claim 12, further comprisinginstructions that, when executed by the at least one processor, causethe system to: determine the digital content item similarity scoresbased on distance values associated with digital content items of thecluster of digital content items; and wherein generating the tag scoresfor the one or more digital content items comprises generating the tagscores based on user selection frequencies of the one or more digitalcontent items associated with the one or more multi-term contextual tagsin response to the user search queries.
 14. The system of claim 13,further comprising instructions that, when executed by the at least oneprocessor, cause the system to: identify a set of multi-term contextualtags from the digital content items of the cluster of digital contentitems; generate a set of aggregated scores for the set of multi-termcontextual tags based on a combination of the tag scores and the digitalcontent item similarity scores; and wherein propagating the one or moremulti-term contextual tags to the one or more additional digital contentitems comprises associating the set of multi-term contextual tags withthe digital content items of the cluster of digital content items basedon the set of aggregated scores.
 15. The system of claim 12, wherein theclustering algorithm comprises a k-nearest neighbor algorithm.
 16. Thesystem of claim 14, further comprising instructions that, when executedby the at least one processor, cause the system to: determine rankingscores for the set of multi-term contextual tags based on the set ofaggregated scores and tag characteristics of multi-term contextual tagsfrom the set of multi-term contextual tags; determine a final set ofmulti-term contextual tags by identifying the ranking scores thatsatisfy a threshold ranking score; and wherein propagating the one ormore multi-term contextual tags to the one or more additional digitalcontent items comprises associating the final set of multi-termcontextual tags with the digital content items of the cluster of digitalcontent items.
 17. The system of claim 16, wherein the tagcharacteristics comprise tag sizes for the multi-term contextual tagsfrom the set of multi-term contextual tags.
 18. The system of claim 11,further comprising instructions that, when executed by the at least oneprocessor, cause the system to: receive an additional search querycomprising a multi-term contextual tag; and return a digital contentitem associated with the multi-term contextual tag.
 19. Acomputer-implemented method comprising: performing a step fordetermining and associating one or more multi-term contextual tags withone or more digital content items from user search queries; performing astep for propagating the one or more multi-term contextual tags to oneor more additional digital content items; receiving an additional searchquery comprising a multi-term contextual tag; and returning a digitalcontent item associated with the multi-term contextual tag.
 20. Thecomputer-implemented method of claim 19, wherein each multi-termcontextual tag, from the one or more multi-term contextual tags,comprises a plurality of terms that represent a concept based on arelation between the plurality of terms.